Construction Business Act Enforcement Actions in Japan

Aoba Kogyo Co., Ltd. (青葉工業株式会社) was ordered to have its business suspended by the Shikoku Regional Development Bureau. The suspension covers business related to civil engineering works nationwide that are related to public works, for 30 days from 21 November 2026 to 20 December 2026. The cause stated is that, jointly with other business operators, Aoba Kogyo Co., Ltd. determined a prospective contractor for certain civil engineering works ordered by Kagawa Prefecture, and enabled that prospective contractor to win the contract, thereby substantially restricting competition in the relevant transaction field against the public interest, at least from 27 May 2021. The text states that this was recognized as an “unreasonable transaction restriction” under Article 2(6) of the Act on Prohibition of Private Monopolization and Maintenance of Fair Trade (Act No. 54 of 1947) and a violation of Article 3 of that Act, and that Aoba Kogyo Co., Ltd. is deemed to fall under Article 28(1) items (ii) and (iii) of the Construction Business Act.

On 6 November 2026, the Shikoku Regional Development Bureau ordered 株式会社村上組 to be suspended from business (営業停止) for 30 days, from 21 November 2026 to 20 December 2026. The order states that the company, jointly with other business operators, for certain civil engineering “general civil engineering works” (土木一式工事) ordered by Kagawa Prefecture, from at the latest 27 May 2021, determined a prospective contractor and enabled that prospective contractor to win the contract, thereby substantially restricting competition in the relevant transaction field in a manner contrary to the public interest. The text states that this was found to fall under “unreasonable transaction restrictions” as provided in Article 2(6) of the Act on Prohibition of Private Monopolization and Maintenance of Fair Trade (Act No. 54 of 1947) and to violate Article 3 of that Act, and that the company received an order for corrective measures and an order to pay a surcharge. The order further states that this is considered to fall under Article 28(1) items (ii) and (iii) of the Construction Business Act (建設業法).

On 2026-11-05, Fukuoka Prefecture issued an order to (SWAT Co., Ltd.) regarding violations of the Construction Business Act (建設業法). The company, in private construction work (building construction, comprehensive) in Iwaki City, Fukushima Prefecture, undertook building construction exceeding the scope of “minor construction work” defined in Article 1-2(1) of the Enforcement Order of the Construction Business Act, without obtaining the building construction permit under Article 3(1) of the Construction Business Act. In the same project, the company did not post the signboard required by Article 40 of the Construction Business Act at the construction site. These matters fall under Article 28(1)(2) of the Construction Business Act.

On 2026-11-05, Fukuoka Prefecture ordered (株)ＳＷＡＴ to suspend its business (for private construction-related sales) for 22 days, from 2026-11-20 to 2026-12-11. The stated grounds are that, in private construction work in Iwaki City, Fukushima Prefecture, (株)ＳＷＡＴ entered into subcontract agreements with amounts equal to or exceeding the amount specified by Cabinet Order under Article 3(1)(ii) of the Construction Business Act without having a license for “specified construction business,” and did not assign a full-time chief technical engineer to the project. The authority cited Construction Business Act Article 28(3) (applicable to Article 28(1)(ii)).

On 2026-11-04, Hokkaido issued an instruction disposition to 北海道クリーン・システム株式会社. The company was found to have violated the Construction Business Act by directly contracting for construction work specified in Article 27-23(1) without having undergone the management matters assessment, which falls under Article 28(1)(ii) of the Act.

On 2026-11-02, the Oita Prefecture issued an order to YKP技建株式会社. The company entered into a subcontracting contract for demolition work despite not having the construction business license required under Article 3(1) of the Construction Business Act, and did so beyond the scope of “minor construction work” defined in Article 1-2(1) of the Enforcement Order of the Construction Business Act. This falls under the main clause of Article 28(1) of the Construction Business Act.

On 2 November 2026, Oita Prefecture issued an order to 株式会社長岡建設工業 regarding private-sector demolition works. The company entered into a subcontract/contract for demolition works that exceeded the scope of “minor works” defined in Article 1-2, Paragraph 1 of the Construction Business Act Enforcement Order, with a party that operates construction business without the license required under Article 3, Paragraph 1 of the Construction Business Act. This falls under Article 28, Paragraph 1, Item 6 of the Construction Business Act.

The Kinki Regional Development Bureau found that Izumihoku Home Co., Ltd. (泉北ホーム株式会社) placed orders for 9,291 construction works without concluding written subcontract contracts that satisfy the statutory particulars under Article 19(1) of the Construction Business Act, despite having operated a practice of determining the subcontract contract amount based on a unit price table by work type prepared in advance. The bureau also found that, for the above orders, prior to contract conclusion, the company did not present the specific quotation conditions listed in Article 19(1) items (excluding item (2)) as provided in the first part of Article 20(3), and likewise did not set the statutory period required for preparing quotations as provided in the latter part of Article 20(3).

For (株)大川内組, the location of the construction business office could not be confirmed. Fukuoka Prefecture published a notice to that effect in the Fukuoka Prefectural Gazette dated September 8, Reiwa 8 (2026). No request/notification was made even after 30 days. This falls under Article 29-2, Paragraph 1 of the Construction Business Act.

The company Shinko Co., Ltd. (株式会社真興) was found to have violated Article 15, Paragraph 2 and Article 26, Paragraph 3 of the Construction Business Act by assigning, as a supervising engineer (監理技術者) for construction work in Fukuoka Prefecture that requires full-time assignment, a dedicated technical engineer who must be stationed full-time at its sales office and exclusively engaged in that role.

On the basis of the business year-end report accepted on September 16, 2026, Okayama Prefecture confirmed that LS Co., Ltd. had assigned, as the chief technical engineer, a company technical engineer who should be permanently stationed at the company’s sales office and exclusively engaged in that engineer’s duties, to a distant detached house demolition and removal construction project that LS Co., Ltd. carried out in September 2025, and that it was not considered that the technical engineer was exclusively assigned to the sales office. This was found to violate Article 7, Paragraph 2 of the Construction Business Act, and therefore an instruction order was issued pursuant to Article 28, Paragraph 1 of the same Act.

Saitama Prefecture issued an order to 首都圏環境サービス株式会社 (Capital Region Environmental Service Co., Ltd.) for violations of Japan’s Construction Business Act (建設業法). The company was found to have (1) concurrently assigned a branch office technical staff member as the chief technical manager for five construction works, and (2) concurrently assigned a person who was appointed as the chief technical manager for public construction works with a contract amount of JPY 45,000,000 or more to also serve as the chief technical manager for four other construction works. These were stated as violations of Article 7, Paragraph 2 and Article 26, Paragraph 3 of the Construction Business Act, respectively.

Shibanaka Construction Co., Ltd. (株式会社芝中工務店) was ordered to suspend business by Saitama Prefecture for exceeding the upper limit on subcontract payments as the prime contractor (violation of Article 16, Paragraph 2 of the Construction Business Act).

Saitama Prefecture issued an order to 株式会社芝中工務店 (Representative: 芝中 博) regarding violations of the Construction Business Act (建設業法). The company was ordered to comply with relevant laws and take measures to prevent recurrence. The stated causes include: (1) failure to provide contract documents for subcontract agreements (violation of Article 19(1) of the Construction Business Act); and (2) failure to keep and preserve books and related records (violation of Article 40-3 of the Construction Business Act).

On October 23, 2026, the Kanto Regional Development Bureau ordered Taisei Construction Co., Ltd. to suspend certain business operations for 120 days (from November 7, 2026 to March 6, 2027). The order is based on the Construction Business Act, Article 28, Paragraph 3 (applicable to Paragraph 1, Items 2 and 3). The underlying cause stated is that, in connection with a terminal station new construction project for the Linear Chuo Shinkansen (Shinagawa Station–Nagoya Station) ordered by Central Japan Railway Company, Taisei Construction Co., Ltd. and its employees were found to have substantially restrained competition in the relevant transaction field, and on March 1, 2021 they received a fine judgment for violation of the Act on Prohibition of Private Monopolization and Maintenance of Fair Trade (Act No. 54 of 1947), with the sentence becoming final on September 19, 2026.

Kashima Construction Co., Ltd. and its employees received a fine for violating the Act on Prohibition of Private Monopolization and Maintenance of Fair Trade (Act No. 54 of 1947) in connection with allegations that they substantially restrained competition in the relevant transaction field for a terminal station new construction project involving the Linear Chuo Shinkansen (Shinagawa Station–Nagoya Station) ordered by Central Japan Railway Company. The conviction was rendered on March 1, 2021, and the sentence became final on September 19, 2026. This is considered to fall under Article 28, Paragraph 1, Items 2 and 3 of the Construction Business Act, and the Kanto Regional Development Bureau ordered a business suspension.

On 21 October 2026, Miyazaki Prefecture issued an instruction order to Ōmune Kōgyō (company name: 大棟工業) under the Construction Business Act. The company entered into a contract for construction work to newly build housing and, based on that contract, delivered the newly built housing to the ordering party, but did not take the financial capacity securing measures prescribed in Article 3, Paragraph 1 of the Act on Securing the Performance of Liability for Defects in Specified Housing. This was found to fall under Article 28, Paragraph 1, Item 9 of the Construction Business Act.

Create Kogyo Co., Ltd. was referred to prosecutors on November 17, 2025 for violations of the Industrial Safety and Health Act (Act No. 57 of 1972) in connection with its construction business. On the basis of a judgment by the Kyotango Summary Court, the company was fined JPY 200,000 and the representative individual was fined JPY 200,000. The criminal sentence became final on April 29, 2026. This falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

有限会社ハシノ工業 was prosecuted on May 9, 2025 for violations of the Industrial Safety and Health Act (Act No. 57 of 1972). The Hirakata Summary Court imposed a fine of JPY 200,000 on the corporation and a fine of JPY 500,000 on the representative individual. The conviction became final on February 10, 2026. This falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Best Co., Ltd. did not submit, without delay, a Worker Death/Injury Accident Report to the chief of the relevant Labor Standards Inspection Office, despite a labor accident in Machida, Tokyo (tobi and civil engineering work) on April 11, 2024, in which the worker was absent from work for 4 days or more. As a result, on March 19, 2026, the Tachikawa Summary Court issued summary penalty orders (fines of JPY 200,000 each) to the company and its representative director for violations of the Industrial Safety and Health Act, and the sentences have become final. This is recognized as falling under Article 28(1)(iii) of the Construction Business Act.

Mori-gumi Co., Ltd. (株式会社森組) was ordered to suspend business by Toyama Prefecture under Article 28, Paragraph 3 of the Construction Business Act (建設業法), which corresponds to Article 28, Paragraph 1, Item 3. The order is based on violations of Article 21, Paragraph 1 of the Industrial Safety and Health Act (労働安全衛生法) and Article 361 of the Industrial Safety and Health Regulations (労働安全衛生規則). On July 2, 2026 (Reiwa 8), the Tona-mi Summary Court issued a summary fine order of JPY 200,000, and the conviction became final on July 18. In addition, the company’s site agent received a summary fine order of JPY 400,000 on July 2, 2026 for violations of the same provisions and for the offense under the first part of Article 211 of the Penal Code (刑法), and the conviction became final on July 18. The business suspension period is from October 30, 2026 to November 1, 2026, limited to certain public works as specified in the decision.

On 14 October 2026, Okayama Prefecture issued an order to Tajima Sash i Co., Ltd. (有限会社田島サッシ) requiring it to take specified compliance measures. The order is based on a violation of Article 11(2) of the Construction Business Act, as the company repeatedly failed to file the documents prescribed under Article 11(2) within four months after the end of each business year, despite having previously received guidance from Okayama Prefecture for the same issue in the most recent five business years and despite no improvement being observed. The order was issued under Article 28(1) of the Construction Business Act.

On October 14, 2026, Okayama Prefecture issued an order to (Y) M・G based on Article 28, Paragraph 1 of the Construction Business Act for violating Article 11, Paragraph 2 of the same Act. The company had previously been instructed by Okayama Prefecture for failing to file, within four months after the end of each business year, the documents prescribed under Article 11, Paragraph 2 for the most recent five business years, but again filed the documents after the deadline by a significant margin, with no improvement observed.

Hyogo Prefecture cancelled the construction business permit of Kabushiki Kaisha Nishida Kusabanaen. The company’s representative director, Kenji Nishida, was convicted for a violation of the Money Lending Business Act, with a sentence of 1 year and 6 months’ imprisonment and a fine of JPY 1,000,000, which became final on July 15, Reiwa 8 (2026). This was treated as falling under Article 8, Item 7 of the Construction Business Act, and therefore under Article 29, Paragraph 1, Item 2 of the same Act.

Sakae Co., Ltd. and its officers were convicted by the Osaka Summary Court and fined JPY 200,000 each for violating Article 14 of the Industrial Safety and Health Act (Act No. 57 of 1972), as specified in Article 6, Item 15-2 of the Enforcement Order of the Industrial Safety and Health Act and Article 517-5, Paragraph 3, Item 3 of the Industrial Safety and Health Regulations. The convictions became final on February 7, Reiwa 8 (2026). This falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Daikō Denken Co., Ltd. (法人番号2021001026410) had its construction business license for the electrical work business cancelled by Kanagawa Prefecture. The decision states that, for the office technical personnel required under Article 7, Paragraph 2 of the Construction Business Act, in June 2023 the personnel were affiliated with another company and were not continuously employed at the company’s office to engage exclusively in their duties, and therefore the company is considered not to meet the license criteria set out in that provision. This is stated to fall under Article 29, Paragraph 1, Item 1 of the Construction Business Act.

On 2026-10-09, Kanagawa Prefecture ordered Kawakami Kenko Co., Ltd. (川上建工株式会社) to suspend business (営業停止) for 11 days, from 2026-10-24 to 2026-11-03. The order relates to violations of the Construction Business Act (建設業法), including conducting construction business without the required construction business license and entering into subcontract agreements exceeding the scope of “minor construction work” under the Enforcement Order of the Construction Business Act (建設業法施行令). The conduct falls under Article 28(1)(6) of the Construction Business Act (as referenced by Article 28(3)).

Osaka Prefecture announced in the Osaka Prefecture Official Gazette that it could not confirm the construction business office location of the relevant construction contractor, but no request/notification was made even after 30 days.

On December 10, Reiwa 7 (令和7年12月10日), the construction business was dissolved by a resolution of the shareholders’ meeting.

According to the documents submitted to the prefecture by Yuhgen Kaisha Nishihara Seisakusho, for private-sector steel structure works for which the Construction Business Act (Act on Construction Business) Article 26(3) and the Enforcement Order of the Construction Business Act Article 27 require the assignment of a full-time chief technical engineer (or equivalent), the company assigned a “branch office technical engineer” as the chief technical engineer, as provided in Article 7(2) of the Construction Business Act, and also assigned the same person as the chief technical engineer at multiple construction sites whose construction periods overlapped. This is considered to violate Article 7(2) and Article 26-5(2) of the Construction Business Act, and to fall under Article 28(1)(ii) of the same Act.

On August 25, 2025, during pre-bid on-site investigation for an air-conditioning unit expansion construction project in Ōbu City, Aichi Prefecture (where Kawakita Denki Kogyo Co., Ltd. was preparing to be a subcontractor), a worker performing current measurement work inside an electrical distribution board touched a live part for some reason, resulting in electrocution and death. The authority states that, although there was a risk of electrocution by touching the live part, the company did not take necessary measures to prevent danger, such as requiring the worker and the live part to use insulating protective equipment, etc. On April 10, 2026, the Handa Summary Court issued a summary order: a fine of JPY 300,000 for the company for violation of the Industrial Safety and Health Act, and a fine of JPY 300,000 for one company employee for violation of the Industrial Safety and Health Act and for death by occupational negligence; the respective sentences have become final. The authority considers this to fall under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

On 2026-09-29, Fukushima Prefecture ordered Mita Construction Co., Ltd. (三田建設株式会社; corporate number 8380001013947) to suspend business operations for 7 days, from 2026-10-13 to 2026-10-19. The suspension applies to sales related to private construction works. The stated cause is that, for private construction works, the company contracted work that does not fall under “minor construction works” as provided in the proviso to Article 3(1) of the Construction Business Act, despite not having a permit for the “scaffolding and earthwork” construction business. This is stated to fall under Article 28(1)(ii) of the Construction Business Act.

Chiba Prefecture ordered a business suspension against Godō Kaisha Shōei (合同会社翔榮) for the entire business of construction operations. The order was based on alleged violations of the Construction Business Act (建設業法) Article 28(1) item 3 and Article 28(3), relating to a subcontracting arrangement involving industrial waste transportation and demolition work. Order details (Chiba Prefecture): - Suspension period: 13 October 2026 to 19 October 2026 (7 days) - Scope: all construction business operations.

On 25 September 2026, Osaka Prefecture imposed a business suspension on フルサワ総研 (representative: 古澤 光洋) under Article 28(3) of the Construction Business Act (建設業法). The business suspension period is 30 days from 9 October 2026 to 7 November 2026, covering all business related to construction. The stated cause is that, in private construction works ordered in Habikino City, the company contracted for construction work without obtaining the permission required under Article 3(1) of the Construction Business Act.

Kanagawa Prefecture cancelled the construction business permit of Innovation Home Co., Ltd. because the company’s office location could not be confirmed. A public notice was issued in the Kanagawa Prefectural Official Gazette (Regular Edition) No. 741 dated August 21, Reiwa 8 (2026), but no request/notification was made by the construction business operator even after 30 days. This falls under Article 29-2, Paragraph 1 of the Construction Business Act.

On November 26, 2025, the Fukushima Prefectural Government finalized fines of JPY 200,000 each against (i) （株）大宗建設工業 and (ii) its Representative Director, for violations of the Industrial Safety and Health Act. The case involved (a) a worker falling from the second-floor roof during a wooden two-story house demolition work and sustaining a fracture/compression injury to the first lumbar vertebra, and (b) the Representative Director preparing a Worker Injury/Illness Report with allegedly false content after falling while climbing a ladder to repair the roof of the company’s warehouse on the company’s headquarters premises, and submitting it to the Director of the Iwaki Labour Standards Inspection Office having jurisdiction.

Chiba Prefecture ordered a business suspension for “Yamabashi Zaimoku-ten Co., Ltd.” (有限会林材木店; corporate number 8040002057746). The order was based on a finding that the company’s representative director, Shiro Hayashi (林 四郎), burned approximately 18 kg of wood waste on the company’s premises in Shiroi City on or about 8:00 a.m. on October 16, 2020, despite there being no statutory exempting grounds. Based on these facts, the company and Shiro Hayashi were each fined JPY 100,000 by a summary order dated March 5, 2021 from the Sakura Summary Court (Reiwa 3 (i) No. 76) for violations of the Act on the Processing of Waste and Public Cleansing. The conduct was deemed to fall under Article 28(1) item (3) and Article 28(3) of the Construction Business Act.

On October 8, 2024, during stone fence foundation work at Torinoko Shrine located at 4725 Etsuenohama, Nishikan-ku, Niigata City, Niigata Prefecture, a foreign technical intern employed by Matsunoo Sangyo Co., Ltd. was using a shovel to excavate soil located below a parent pillar that forms part of the stone fence and to move that soil. The parent pillar fell toward the intern, and an accident occurred in which the intern died. As a result, the company and its representative director were fined for violations of the Industrial Safety and Health Act (¥200,000 for the corporation and ¥200,000 for the representative director), and the conviction became final on February 10, 2026. This was found to fall under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

On 2026-09-15, Nara Prefecture ordered YOSHII CONSTRUCTION CO., LTD. (吉井建設（株）) to be suspended from business related to public works for 22 days, from 2026-10-13 to 2026-11-03. The order states that, in bidding and contracting procedures for construction works ordered by Nara Prefecture, the company submitted documents indicating a person who did not actually meet the requirements for a chief technical engineer under Article 26(1) of the Construction Business Act, and did not appoint a chief technical engineer pursuant to that provision for the relevant work. The authority found these matters to fall under Article 28(1)(ii) of the Construction Business Act (as referenced by Article 28(3)).

On April 17, 2026, Ehime Prefecture issued an instruction disposition under the Construction Business Act to 株式会社イタバシ (corporate number 1500001010921). The disposition is based on an incident on July 8, 2024, at a national government construction site in Ochi Town, Takaoka-gun, Kochi Prefecture (ordered by the Shikoku Regional Development Bureau, Tosa National Highway Office), where a worker fell from a height of approximately 12 meters and was injured. The company and its site responsible person were found to have not taken necessary measures to prevent danger caused by the fall. The company received a summary fine order for a violation of the Industrial Safety and Health Act, and the site responsible person received a summary fine order for violations of the same Act and for injury caused by occupational negligence; the sentences have become final. This falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

On December 18, 2025, Nakayama Toso (中山塗装) was instructed by Tottori Prefecture under Article 28(1) of the Construction Business Act (建設業法) (falling under Article 28(1)(iii)). The instruction relates to work at a residential roof painting construction site in Kaisei, Yonago City, Tottori Prefecture, where workers were made to perform painting work using the second-floor roof as a work platform. The work location was 5.91 meters above ground level and there was a risk to workers due to potential falls. Although it was easy to install external scaffolding and provide enclosures and handrails at the roof edge of the second floor, such measures were not taken. Regarding this matter, the company received a summary order (略式命令) from the Yonago Summary Court for a fine due to a violation of the Industrial Safety and Health Act (労働安全衛生法), and the sentence became final on May 29, 2026. This was deemed to fall under Article 28(1)(iii) of the Construction Business Act.

On 2026-09-14, Fukushima Prefecture ordered Hirata Tosou Bousui Co., Ltd. to be suspended from business for 22 days (from 2026-09-28 to 2026-10-19) for violations of the Construction Business Act. The order relates to private construction contracts in which the company accepted work exceeding the scope of “minor construction work” under Article 3(1) of the Act, despite having no office technical personnel and lacking the permit requirements for waterproofing work; and in the relevant contracted work, it assigned as chief technical engineer a person who did not meet the qualification requirements for waterproofing work, in violation of Article 26(1). These matters fall under Article 28(3) (Article 28(1)(2)).

Kanazawa Seizai Kogyo Kyodo Kumiai had its construction business license cancelled by Ishikawa Prefecture under Article 29(1)(1) of the Construction Business Act. The organization’s management-responsible person for business management (as provided in Article 7(1)(i)) and its office technical personnel (as provided in Article 7(1)(ii)) were operating separate individual businesses and were not stationed full-time at the organization’s office to devote themselves exclusively to their duties, and therefore did not meet the permit standards set out in those provisions.

Osaka Prefecture cancelled the construction business license of 中平電気工事 (permit No. 大阪府知事許可（般－３）第146005号) under Article 29(1)(2) of the Construction Business Act. The company was sentenced to a fine of JPY 200,000 for the offense under Article 204 of the Penal Code (Act No. 45 of 1907), and the sentence became final on April 4, Reiwa 7 (2025).

On 2026-09-14, the Chubu Regional Development Bureau issued an order to Kabushiki Kaisha Otake. The authority found that, in multiple privately ordered construction works that Otake had contracted for by at least September 2021, although technical personnel were assigned in appearance, engineering-related involvement in practice was not recognized because work-process management, quality control, safety management, and technical guidance during construction were not carried out. The authority also found that Otake had subcontracted the contracted construction works in bulk to subcontractors. The authority concluded that this violates Article 22, Paragraph 1 of the Construction Business Act and falls under Article 28, Paragraph 1, Item 4 of the same Act.

On 2026-09-10, Oita Prefecture issued an instruction to Yamanaka Construction Co., Ltd. (有限会社野上工務店) regarding a violation of the Construction Business Act (建設業法). The company entered into a subcontract for private-sector demolition work with a party that operates construction business without the license required under Article 3(1) of the Construction Business Act, and the contract exceeded the scope of “minor construction work” defined in Article 1-2(1) of the Enforcement Order (建設業法施行令). This was deemed to fall under Article 28(1)(6) of the Construction Business Act.

On private construction projects, Hasekomu Co., Ltd. entered into subcontract agreements for carpentry work with a party that is not a “minor construction work” as defined in Article 1-2 of the Construction Business Act Enforcement Order (Cabinet Order No. 273 of 1961), even though the party was operating construction business without obtaining the permit for the carpentry work business required under Article 3, Paragraph 1 of the Construction Business Act. This is considered to fall under Article 28, Paragraph 1, Item 6 of the Construction Business Act.

On June 22, 2026, Okayama Summary Court issued summary penalty orders imposing fines on One Set Co., Ltd. and its officers for violations of the Industrial Safety and Health Act in connection with the company’s business; the sentences have become final. This falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act, and the company is subject to an instruction disposition under Article 28, Paragraph 1.

On September 9, 2026, Osaka Prefecture canceled the construction business permit of Shikou Sangyo Co., Ltd. (corporate number: 3120101054574) under Article 29(1)(2) of the Construction Business Act. The stated cause is that the company’s director was sentenced to a fine of JPY 100,000 for the offense under Article 208 of the Penal Code (Act No. 45 of 1907) and the sentence became final on July 9, 2022.

E-Life Co., Ltd.（（株）イーライフ） had its permit for a specified construction business related to electrical work (特定建設業) cancelled by Fukuoka Prefecture. The cancellation was based on the fact that the location of the construction business office could not be confirmed; Fukuoka Prefecture公告ed this in the Fukuoka Prefectural Gazette dated July 31, Reiwa 8 (2026), but no request/notification was made even after 30 days. This falls under Article 29-2, Paragraph 1 of the Construction Business Act (建設業法第29条の２第１項).

Hokkaido issued an instruction to Kanetsu Ken Co., Ltd. (株式会社細建) under the Construction Business Act (建設業法) for conduct that falls under Article 28, Paragraph 1, Item 2 of the Act. The company is stated to have concluded four construction contract(s) ordered by Nakatonbetsu Town on or after November 1, 2025, without having a valid Management Matters Assessment result, in violation of Article 27-23, Paragraph 1 of the Act.

On February 1, 2025, during a water pipe installation work in Ibaraki City, Osaka Prefecture that was contracted by the company as a subcontractor from the general contractor, a company worker was injured while cleaning the roadside shoulder. The injury required approximately two months of medical treatment and resulted in an absence from work of 4 days or more. Although the company’s representative director, A, was required to promptly report the worker’s injury/death (worker injury and illness report) to the Director of the Ibaraki Labor Standards Inspection Office using an electronic data processing system, A did not make the report. As a result, the company and A were each sentenced to a fine of JPY 200,000 for violations of the Industrial Safety and Health Act (Act No. 57 of 1972). The sentences became final on April 25, 2026.

Kyoto Prefecture issued an order to 光建設株式会社 (Koken Construction Co., Ltd.) under the Construction Business Act (建設業法) for failing to submit required notifications within the statutory time limits after (i) changing the technical personnel for a specified business office and (ii) discontinuing certain construction business lines.

On March 31, 2026, the Oyama Summary Court issued a summary order against Hirano Waterproofing Co., Ltd. (ヒラノ防水株式会社) and its representative in connection with a waterproofing construction work performed on the rooftop tower of a building on October 24, 2024, in which a person involved in the work died. The company was fined JPY 400,000 for violation of the Industrial Safety and Health Act, and the representative was fined JPY 400,000 for violation of the Industrial Safety and Health Act and for professional negligence resulting in death. The order became final. This was recognized as falling under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

On private construction works, Suzukanekoumuten Co., Ltd. (株式会社鈴兼工務店) was found to fall under Article 28, Paragraph 1, Item 2 of the Construction Business Act, because it contracted for carpentry work that does not qualify as “minor construction work” under Article 1-2 of the Order for Enforcement of the Construction Business Act (Cabinet Order No. 273 of 1956), despite not having a license for the carpentry business in violation of Article 3, Paragraph 1 of the Construction Business Act.

On 26 August 2026, Kochi Prefecture cancelled the construction business permit of Yugen Kaisha Shikoku Tsushin System (corporate number 5490002008376) under Article 29(1)(ii) of the Construction Business Act (建設業法). The decision states that the company’s representative director, Eiji Yūto (榮 勇男), conspired with Ono Kazuyuki (小野和幸), then representative director of Inoue Denco Co., Ltd. (株式会社井上電工), and the then Mayor of Tosashimizu City and members of the Tosashimizu City assembly, regarding a designated-competition bidding process conducted by Tosashimizu City for the “Lodging-type Multicultural Coexistence Community Facility Renovation Work (Electrical Equipment).” The decision further states that they provided guidance on the minimum restricted price, resulting in Inoue Denco Co., Ltd. being awarded the contract. The decision states that, as a result, on 10 June 2026, the Kochi District Court found the conduct in violation of Article 96-6(1) of the Penal Code (as it was before amendments by the Act Partially Amending the Penal Code, etc. (Act No. 67 of 2022)) in relation to Article 60 of the Penal Code (Act No. 45 of 1907), and imposed a sentence of imprisonment for one year with a three-year suspension; the sentence became final on the same date. The decision concludes that this falls under Article 29(1)(ii) of the Construction Business Act.

On 26 August 2026, Aomori Prefecture ordered Taisei Sangyo Co., Ltd. to suspend certain construction-related business activities under the Construction Business Act. The basis stated is that a person who is deemed to have been an “employee” as defined in Article 3 of the Cabinet Order for the Construction Business Act (Cabinet Order No. 273 of 1956) was confirmed to have violated the Penal Code (Act No. 45 of 1907) in connection with their duties, which falls under Article 28(1)(iii) of the Construction Business Act (as applied via Article 28(3)).

Osaka Prefecture cancelled the construction business permit of 有限会社山口建装工業 (corporate number 4120102016242). The cancellation was based on Construction Business Act Article 29(1)(2). The company’s director was convicted under Criminal Code (Act No. 45 of 1907) Article 208 and was sentenced to a fine of JPY 100,000; the conviction became final on September 20, 2024.

On August 22, 2026, Osaka Prefecture cancelled the construction business permit of 株式会社能登屋水道工業所 (corporate number 7120001024839) under Article 29(1)(2) of the Construction Business Act (建設業法). The cancellation relates to the company’s director being convicted under Article 208 of the Penal Code (刑法, Meiji 40, Law No. 45) and sentenced to a fine of JPY 100,000, with the conviction becoming final on November 16, 2021.

In Kochi Prefecture, the company Inoue Denko Co., Ltd. (法人番号2490001004817) was ordered to suspend business under the Construction Business Act. The suspension is for one year, from September 4, 2026 to September 3, 2027, covering business related to electrical construction work involving public works. According to the stated cause, Ono Kazuyuki, who was the company’s then representative director, conspired with the representative director of Shikoku Tsushin System Co., Ltd. and, at the time, the Mayor of Tosashimizu City and members of the Tosashimizu City Assembly regarding a designated competitive bidding for the “Lodging-type Multicultural Coexistence Community Facility Renovation Work (Electrical Equipment)” conducted by Tosashimizu City. They received instruction on the minimum required price and won the contract. As a result, on June 10, 2026, the Kochi District Court found them guilty for violating Article 96-6, Paragraph 1 of the Penal Code prior to amendments made by the Act on Partial Amendment of the Penal Code, etc. (Act No. 67 of 2022), as well as Article 60 of the Penal Code (Act No. 45 of 1907). The sentence was imprisonment for one year and six months, with a three-year suspension of execution, and the conviction became final on the same date. This is stated to fall under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

On 2026-08-19, Osaka Prefecture imposed a business suspension on 株式会社ギアマックス (corporate number: 7120001224496) under Article 28(3) of the Construction Business Act (建設業法). The business suspension period is from 2026-09-01 to 2026-10-14 (44 days). The suspension covers all business related to construction business activities. The alleged causes relate to violations involving (i) placement of supervisory/management engineers without meeting qualification requirements and without a direct and continuous employment relationship, (ii) subcontracting the entire construction work to 株式会社一六八建設, (iii) entering into subcontract agreements without the required permission where the subcontract amount is at or above the amount specified by Cabinet Order, (iv) entering into subcontract agreements with the company operating construction business without the required permission, and (v) failure to assign a chief technical engineer at another private construction project in Osaka City.

On August 19, 2026, Osaka Prefecture issued an instruction to 株式会社ギアマックス (corporate number 7120001224496) regarding violations of the Construction Business Act. The company, in private construction works ordered in Osaka City, violated Article 7, Paragraph 2 and Article 26, Paragraph 3 of the Construction Business Act by assigning a full-time technical engineer at the company’s office—who is specified in Article 7, Paragraph 2—as a chief technical engineer to the construction site, even though a chief technical engineer requiring full-time assignment was required.

On August 18, 2026, Okinawa Prefecture cancelled the general construction business permit of 株式会社 興那下 (corporate number 6360001025442) for the plastering work business. The stated cause is that the company’s representative director, 興那下 将輝, was convicted and the sentence became final on September 26, 2025, by the Naha District Court for the offense under Article 207 of the Penal Code (Meiji 40, Law No. 45) (Special Provisions for Concurrent Injury). The text states that this falls under Article 8, items (7) and (12) of the Construction Business Act, and therefore corresponds to Article 29, paragraph (1), item (2) of the same Act.

Miyagi Prefecture revoked the general construction business permit of Godō Kaisha KOG because the company’s business office location could not be confirmed. Miyagi Prefecture公告ed this in Miyagi Prefecture Public Notice No. 293 in the Miyagi Prefecture Official Gazette dated March 31, Reiwa 8 (2026), but no request/notification was made within 30 days from that date. This falls under Article 29-2, Paragraph 3 of the Construction Business Act.

On August 18, 2026, Shizuoka Prefecture issued an order to 株式会社野村商店 (corporate number 6080101013276). The company is alleged to have violated Article 19, Paragraph 2 of the Construction Business Act by failing to prepare a written document regarding changes to contract terms for a private residential renovation construction carried out in Ito City in 2018. This is recognized as falling under Article 28, Paragraph 1 of the same Act.

On the basis of Article 28, Paragraph 3 of the Construction Business Act (建設業法), Osaka Prefecture imposed a business suspension on Anjigawa Shoten Co., Ltd. (株式会社安治川商店) for 7 days, from September 1, 2026 to September 7, 2026. The suspension covers all business related to construction. The stated cause is that, in private construction projects in Ibaraki City, the company entered into a subcontract agreement with Ichiroku Hensetsu Co., Ltd. (株式会社一六八建設), which conducts construction business without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

On 2026-08-18, Osaka Prefecture imposed a business suspension on 株式会社Acala. The suspension period is from 2026-09-01 to 2026-09-07 (7 days). The suspension covers all business related to construction. The stated cause is that, for private construction works in Osaka City, the company entered into subcontract agreements where the subcontract amount was at least the amount specified by Cabinet Order under Article 3(1)(ii) of the Construction Business Act, without obtaining the permission by the category set out in Article 3(1)(ii), in violation of Article 16(1) of the same Act.

On August 18, 2026, Osaka Prefecture issued an order to 株式会社Acala. The company was found to have violated Article 7, Paragraph 2 and Article 26, Paragraph 3 of the Construction Business Act by assigning, as a chief technical engineer requiring full-time assignment, a technical engineer who was required to be assigned exclusively at the company’s office (as provided in Article 7, Paragraph 2) to a construction site for a privately ordered construction project in Osaka City.

On 18 August 2026, Osaka Prefecture imposed a business suspension on 株式会社ユーテック. The suspension is for 7 days from 1 September 2026 to 7 September 2026, covering all business related to construction. The stated cause is that, for private construction works ordered in Osaka City, the company entered into a subcontract agreement with 株式会社平和創建, which operates construction business without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

On August 18, 2026, Osaka Prefecture imposed a business suspension on 株式会社一六八建設 (corporate number: 8180001157376) under Article 28, Paragraph 3 of the Construction Business Act (建設業法). The suspension period is 45 days from September 1, 2026 to October 15, 2026, and covers all business related to construction. The company is stated to have contracted, in private construction works in Osaka City and Ibaraki City, construction work with a contract amount equal to or exceeding the amount specified in Article 1-2 of the Enforcement Order of the Construction Business Act, without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

Yuusei Co., Ltd. (（株）ユウセイ) had its general construction business permit cancelled by Fukuoka Prefecture. The company’s officer was convicted for a violation of the Construction Business Act (Act No. 100 of 1950) by the Fukuoka Summary Court and was sentenced to a fine of JPY 500,000; the conviction became final on June 4, Reiwa 8 (2026). This falls under Article 29, Paragraph 1, Item 1 of the Construction Business Act.

On 18 August 2026, the Tokyo Metropolitan Government ordered Godō Kaisha M-Planning (合同会社エムプランニング; corporate number 8010903006259) to suspend all construction business activities for three days from 1 September 2026 to 3 September 2026. The order was based on the company’s alleged violation of the Construction Business Act: in private construction works in Kokubunji City, Tokyo, it entered into a construction contract exceeding the amount specified in Article 1-2, Paragraph 1 of the Enforcement Order of the Construction Business Act without having the permission required under Article 3, Paragraph 1 of the Construction Business Act. This was stated to fall under Article 28, Paragraph 2, Item 2 and Paragraph 3 of the Construction Business Act.

On September 29, 2023, Shizuoka Prefecture issued a correction request to the owner regarding a private residential renovation construction carried out by Nomura Shoten Co., Ltd. in Ito City in 2018, stating that the relevant building was in violation of the Building Standards Act. This was recognized as falling under Article 28, Paragraph 1, Item 3 and Article 28, Paragraph 1, Item 2 of the Construction Business Act. Shizuoka Prefecture issued a business suspension order under Article 28, Paragraph 3 of the Construction Business Act.

Tokyo Metropolitan Government announced in the Tokyo Metropolitan Gazette dated June 26, 2026 that it could not confirm the location of the construction business office of the relevant construction business operator, but no request/notification was made even after 30 days from the date of the announcement. This falls under Article 29-2, Paragraph 1 of the Construction Business Act.

Okinawa Prefecture cancelled the construction business permit of Kamisato Kogyo Co., Ltd. (corporate number: 4360001028018). The representative director, Yo Kamisato, was convicted and the conviction became final on August 23, 2023 by the Naha Summary Court (Okinawa) for the offense of assault under Article 208 of the Penal Code (Act No. 45 of 1907), with a fine of JPY 100,000. This was treated as falling under Article 8, Item 8 of the Construction Business Act, and therefore as falling under Article 29, Paragraph 1, Item 2 of the same Act.

On the basis of Article 28, Paragraph 3 of the Construction Business Act, Osaka Prefecture imposed a business suspension on Tomoku Co., Ltd. (法人番号9120001160005). The suspension period is from September 1, 2026 to September 7, 2026 (7 days). The scope of the suspension is all business related to construction. The stated cause is that, for a privately ordered construction project in Ibaraki City, Tomoku Co., Ltd. entered into a subcontract agreement with Ichiroku Hensetsu Co., Ltd., which operates construction business without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

On 18 August 2026, Osaka Prefecture imposed a business suspension on Ohata Equipment Co., Ltd. (大畑設備株式会社; corporate number 2120001242354) under Article 28(3) of the Construction Business Act (建設業法). The business suspension period is 25 days from 1 September 2026 to 25 September 2026, and covers all business related to construction business. The stated grounds include: (i) in private construction works in Osaka City (the “Relevant Construction”), the company violated Article 26(1) by not assigning a person in charge of technical management of construction work at the construction site, and by not primarily performing matters such as on-site technical guidance to subcontractors, consultation with the general contractor, and making decisions/responses to matters for consultation from subcontractors; instead, it had the main portion of the plumbing work it had contracted for assigned to “東進” (Toshin). (ii) The company also violated Article 22(1) by having the construction works it had contracted for wholly subcontracted to the same party. (iii) For the Relevant Construction and private construction works in Ibaraki City, the company entered into subcontract agreements with “株式会社一六八建設” (Ichirokuhakkensetsu Co., Ltd.) without obtaining the permission required under Article 3(1) of the Construction Business Act.

Miyagi Prefecture canceled the general construction business permit for 株式会社CocoReno. The company’s office location could not be confirmed; Miyagi Prefecture公告ed this in Miyagi Prefecture Public Notice (Miyagi Prefecture Notice No. 293) dated March 31, 令和8 (2026). No request/notification was made within 30 days from the date of the公告. This falls under Article 29-2, Paragraph 4 of the Construction Business Act.

On 2026-08-18, Osaka Prefecture issued a business suspension order to 彩蓮電工 (representative: 岡本 祐太) for violating the Construction Business Act. The order is based on the company’s subcontract agreement with 株式会社DIO for a private construction order project in Osaka City, without obtaining the permission required under Article 3(1) of the Construction Business Act.

Osaka Prefecture ordered 神空調有限会社 (corporate number: 5120902017117) to be suspended from business for 15 days for violations of the Construction Business Act, including failure to assign a person responsible for technical management at the construction site and subcontracting/contracting in violation of the Act.

On 2026-08-18, Osaka Prefecture imposed a business suspension on 東進 (representative: 東川 孔和) under the Construction Business Act (建設業法) Article 28(3). The business suspension period is from 2026-09-01 to 2026-09-15 (15 days). The scope covers all business related to construction business. The stated cause is that, for a private construction project in Osaka City (the “Project”), the company violated Article 26(1) by not assigning a person in charge of technical management of construction work at the project site, and by not primarily performing tasks such as on-site technical guidance to subcontractors, consultation with the general contractor, and making decisions/responses regarding matters for consultation from subcontractors; the company subcontracted the plumbing work, which is the main part of the Project, from 大畑設備株式会社. The stated cause also includes a violation of Article 22(2) by taking the construction work that was subcontracted to it in its entirety.

On August 18, 2026, Osaka Prefecture issued an instruction to スマLAB株式会社 (corporate number 2140001121647) regarding its construction business permit (Osaka Prefecture Governor’s permission (General) No. 162306). The company was instructed to comply with the Construction Business Act and other laws/regulations related to construction works, and to take thorough measures to ensure that similar cases do not occur again, thereby securing appropriate business operations as a construction contractor.

On 18 August 2026, the Tokyo Metropolitan Government ordered 有限会社ワッツインターナショナル (Watts International Co., Ltd.) to suspend all construction business operations for four days, from 1 September 2026 (Tuesday) to 4 September 2026 (Friday). The order is based on alleged violations of the Construction Business Act: the company entered into construction subcontract contracts with amounts equal to or exceeding those specified in Article 1-2, Paragraph 1 of the Enforcement Order of the Construction Business Act during a period when it did not have a construction business license, in multiple private construction projects in and around Osaka City, Osaka Prefecture, in violation of Article 3, Paragraph 1 of the Construction Business Act. This is stated to fall under Article 28, Paragraph 2, Item 2 and Paragraph 3 of the Construction Business Act.

Tokyo announced in the Tokyo Metropolitan Government Gazette dated June 26, Reiwa 8 (2026) that it could not confirm the location of the construction business office of 日本総合建設株式会社, but no request/notification was made within 30 days from the date of the announcement. This falls under Article 29-2, Paragraph 1 of the Construction Business Act.

On the basis of Article 28, Paragraph 3 of the Construction Business Act, Osaka Prefecture imposed a business suspension on 株式会社大鵬. The suspension period is from September 1, 2026 to September 7, 2026 (7 days). The scope of the suspension is all business related to construction. The stated cause is that, for a privately ordered construction project in Osaka City, the company entered into a subcontract agreement with 株式会社一六八建設, which operates a construction business without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

Tokyo announced in the Tokyo Metropolitan Government Gazette dated June 26, Reiwa 8 (2026) that the location of the construction business office of the relevant construction contractor could not be confirmed. No request/notification was made within 30 days from the date of the announcement. This falls under Article 29-2, Paragraph 1 of the Construction Business Act.

On August 18, 2026, Osaka Prefecture imposed a business suspension on 株式会社Daiden (corporate number: 2120001146761) under Article 28(3) of the Construction Business Act (建設業法). The business suspension period is from September 1, 2026 to September 22, 2026 (22 days). The suspension covers all business related to construction business. The stated causes include (i) violations of Article 26(1) and Article 22(1) in connection with a private construction order in Osaka City, and (ii) a subcontract agreement with 株式会社一六八建設 without obtaining the required permission under Article 3(1).

On November 6, 2024, 株式会社Ｉｎｎｏｖａｔｉｏｎ Ｓｙｓｔｅｍ did not take necessary measures to prevent workers’ danger in a security camera installation construction project in Ibaraki-machi, Higashi-Ibaraki-gun, Ibaraki Prefecture. The text states that this violated Article 21, Paragraph 2 of the Industrial Safety and Health Act (Act No. 57 of 1972) and Article 524 of the Industrial Safety and Health Regulations (Ministry of Labour Ordinance No. 32 of 1972), and that on January 6, 2026, the company was ordered to pay a fine. The text further states that this falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Tokyo announced in the Tokyo Metropolitan Gazette dated June 26, Reiwa 8 (2026) that the location of the construction business office of the relevant construction contractor could not be confirmed. No request/notification was made even after 30 days from the date of the public notice. This falls under Article 29-2, Paragraph 1 of the Construction Business Act.

On August 18, 2026, Osaka Prefecture issued a business suspension order to スマLAB株式会社 (corporate number: 2140001121647) for violating the Construction Business Act. The company was ordered to suspend all business related to construction for 7 days from September 1, 2026 to September 7, 2026. The stated cause is that, in private construction works in Osaka City, the company entered into a subcontract agreement with 株式会社一六八建設, which operates construction business without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

On August 18, 2026, Osaka Prefecture imposed a business suspension on 株式会社インテリジェント (corporate number: 8122001017202) for 12 days, from September 1, 2026 to September 12, 2026. The suspension is based on Article 28, Paragraph 3 of the Construction Business Act. The stated cause is that, in private construction works in Ibaraki City, the company contracted construction works with a contract amount equal to or exceeding the amount specified in Article 1-2 of the Enforcement Order of the Construction Business Act without obtaining the permission required under Article 3, Paragraph 1 of the Construction Business Act.

On August 18, 2026, Okinawa Prefecture cancelled the construction business permit of 株式会社與那下 (corporate number 6360001025442) for general construction business related to plastering work. The decision states that the company’s representative director, 與那下 将輝, was convicted and the sentence became final on September 26, 2025, by the Naha District Court for offenses under Article 204 and Article 249(1) of the Penal Code prior to amendments made by the Act Partially Amending the Penal Code (Act No. 67 of 2022). The decision indicates this falls under Article 8 items (7) and (12) of the Construction Business Act, and therefore the permit cancellation is recognized as falling under Article 29(1)(2) of the same Act.

On August 18, 2026, Okinawa Prefecture cancelled the construction business permit of 株式会社 與那下 (corporate number 6360001025442) for general construction business related to plastering work. The cancellation is stated to be based on Article 29(1)(ii) of the Construction Business Act, following a criminal conviction of the company’s representative director, 與那下 将輝, by the Naha District Court on September 24, 2025 (sentence: imprisonment for 1 year and 6 months, with a 3-year suspension; conviction finalized on September 26, 2025).

Fukushima Prefecture ordered (Yuk.) AITEC (corporate number: 380002004510) to suspend all construction business operations for 3 days, from August 31, 2026 to September 2, 2026, under the Construction Business Act (建設業法). The order relates to an incident on February 17, 2025 at a new construction project for “(tentative name) cafe kotonoha” located in Namie-machi, Futaba-gun, Fukushima Prefecture, where a worker of a second-tier subcontractor engaged by AITEC fell from a work platform of a 2.21 m height wedge-tied scaffold and died because fall-prevention equipment such as handrails and midrails were not installed. As of April 2, 2026, AITEC was fined JPY 300,000 for violations of the Industrial Safety and Health Act, and the company’s representative director was fined JPY 500,000 for violations of the Industrial Safety and Health Act and for professional negligence resulting in death. This was found to fall under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Yamashita Kogyo Co., Ltd. received a sentence of a fine of JPY 200,000 for violating the Industrial Safety and Health Act (Act No. 57 of 1972) from the Ukyo Summary Court, and the sentence became final on March 7, 2026 (Reiwa 8). This fact falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act (Act No. 100 of 1954), and, pursuant to Article 28, Paragraph 1, it is subject to an instruction (指示) administrative disposition.

Ishikawa Prefecture cancelled the construction business permit of ＳＳＫ管理システム株式会社 (SSK Management System Co., Ltd.; corporate number 3220001014081). The cancellation was based on Construction Business Act, Article 29(1)(ii), due to the company’s representative director being convicted under Penal Code (Act No. 45 of 1907), Article 204 (Injury): on January 7, 2025, the Komatsu Summary Court issued a summary fine order of JPY 200,000, and the conviction became final on January 25, 2025.

On October 1, 2024, Shinto Esprecision Co., Ltd. (新東エスプレシジョン株式会社) ceased to exist due to a merger. This falls under Article 29, Paragraph 1, Item 5 of the Construction Business Act (建設業法).

Keihin Electric Appliance Service Co., Ltd. was dissolved by a resolution of its shareholders’ meeting on September 30, 2022. This falls under Article 29, Paragraph 1, Item 5 of the Construction Business Act.

Kanagawa Boring Industry Co., Ltd. was dissolved by resolution of a shareholders’ meeting on September 13, 2023. This falls under Article 29, Paragraph 1, Item 5 of the Construction Business Act.

For Shinwa Kensetsu Co., Ltd. (（株）進和建設), the location of the construction business office could not be confirmed. The Fukuoka Prefecture public notice dated June 16, 2026 (Reiwa 8) stated this, but no request/notification was made even after 30 days. This falls under Article 29-2, Paragraph 1 of the Construction Business Act (建設業法第29条の２第１項).