Construction Business Act Enforcement Actions in Japan

光サービスの事業主は、建設工事により生じた産業廃棄物を自家製焼却炉で焼却したことにより起訴され、廃棄物の処理及び清掃に関する法律等に基づき、罰金20万円の略式命令を受け、その刑が確定した。

令和６年11月22日、栃木県河内郡上三川町内の工事現場において、高さ約10メートルの上階から落下した鉄パイプが従事者の背中に当たり、休業見込み６か月を要する左腰椎横突起骨折等の負傷をし、翌日から４日以上休業した。 しかし、令和７年４月22日、株式会社サヤデンの代表取締役はこれについて、川越労働基準監督署長に対し、「サヤデン工場内（埼玉県川越市）で工事の段取り中、中２階の作業者が鉄パイプを落とし、下にいた作業者（受傷者）の背中部分に当たった」旨、虚偽の労働者死傷病報告を提出した。 これにより、株式会社サヤデン及び同社代表取締役は、労働安全衛生法第100条第1項、第120条第５号及び第122条により川越簡易裁判所から各々罰金20万円の判決を受け、令和８年１月30日に当該判決が確定した。 このことは、建設業法第28条第１項第３号に該当する。

当該建設業者の役員が、刑法第204条の罪により、罰金刑に処せられ、令和５年７月11日に刑の執行が終了してから５年を経過しておらず（建設業法第８条第12号及び第８号）、建設業法第29条第１項第２号に該当する。

株式会社ジェイプランニングの営業所の所在地を確知することができないため、令和８年３月27日付け静岡県公報第710号でその旨を公告したが、当該公告の日から30日を経過しても同社から申出がなかった。

令和７年10月21日から22日にかけ、一般国道299号歩道内において水道管敷設のための床掘作業中、ＮＴＴの埋設管及び通信ケーブルを破損した。これにより、周辺のＡＴＭ、電話及びインターネット回線に通信障害が発生し、全回線の仮復旧が完了したのは10月23日午前０時10分頃となった。 このことは、建設業法第28条第１項第１号に該当する。

関東建設工業株式会社の元社員は、群馬県桐生市が令和４年１０月１９日に入札を執行した「桐生市新本庁舎建設工事」の入札に関し、偽計を用いて、公の入札で契約を締結するためのものの公正を害すべき行為をしたとして、令和７年１２月２４日にさいたま地方裁判所から公契約関係競売等妨害罪により懲役１年（執行猶予３年）の判決を受け、その刑が確定している。 このことが建設業法第２８条第１項第２号に該当すると認められる。

当該建設業者の取締役が、刑法（明治40年法律第45号）第208条の罪により、罰金15万円の刑に処せられ、令和４年１月12日にその刑が確定した。

令和６年８月６日に群馬県邑楽郡板倉町泉野地内で施工していたシーピー化成株式会社首都圏成型工業建設計画において、労働者Ａが芝の荷降ろし作業を行っていたところ、崩れてきた芝をよけようとした際に左足首を骨折し、４日以上の休業を要することとなったにもかかわらず、同社代表取締役大澤勝彦は、労働者Ａに対し労働者災害補償保険を使用させず、また、太田労働基準監督署に対して労働者死傷病報告を提出しなかったものである。 これにより同社及び代表取締役は労働安全衛生法及び労働安全衛生規則違反により、館林簡易裁判所から法人２０万円、個人２０万円の罰金の判決を受け、令和８年２月２０日に確定した。 このことは、建設業法第２８条第１項第３号に該当する。

当該建設業者の営業所の所在地が確知できないため、令和８年３月11日大阪府告示第368号によりその事実を公告したが、当該公告の日から30日を経過しても当該建設業者から申出がなかった。

当該建設業を営む者は、２０２５年日本国際博覧会の建設工事において、建設業法第３条第１項の規定に違反して同項の許可を受けないで請負代金が建設業法施行令第１条の２に定める金額以上となる建設工事を請け負った。

当該建設業を営む者は、２０２５年日本国際博覧会の建設工事において、建設業法第３条第１項の規定に違反して同項の許可を受けないで請負代金が建設業法施行令第１条の２に定める金額以上となる建設工事を請け負った。

E-First Corporation assigned a site engineer as the chief engineer in multiple construction projects requiring the appointment of a dedicated chief engineer, in violation of Article 26, Paragraph 3 of the Building Business Act. This is deemed to correspond to the provisions of Article 28, Paragraph 1 of the same Act.

当該建設業を営む者は、２０２５年日本国際博覧会の建設工事において、建設業法第３条第１項の規定に違反して同項の許可を受けないで請負代金が建設業法施行令第１条の２に定める金額以上となる建設工事を請け負った。

Because the location of the construction company's office could not be confirmed, it was announced in the Kagoshima Prefecture Public Notice on March 17, Reiwa 8, but no application was received from the construction company within 30 days of the announcement.

The company used PC steel bars of different specifications from those in the design documents during the Kamo River riverbed improvement project ordered by Toyama Prefecture, without reporting this to Toyama Prefecture, resulting in a significant defect in the construction. Additionally, the company submitted a false inspection certificate claiming the PC steel bars were in accordance with the design documents. This constitutes a violation of Article 28, Paragraph 1, Item 2 of the Construction Business Act.

Manya Kensetsu Co., Ltd. and one of its employees received summary orders (each a fine of 200,000 yen) from Numata Summary Court on December 25, 2025, for violations of the Industrial Safety and Health Act. The violations relate to an incident on March 13, 2025, during a new construction project in Numata City, Gunma Prefecture, where one worker fell from an eave and was injured. Despite the risk of falling and danger to the worker, the company did not install barriers, handrails, or coverings at the site to prevent labor accidents, and allowed the worker to use the eave as a work platform while removing protective sheets. This is recognized as corresponding to Article 28, Paragraph 1, Item 3 of the Construction Business Act.

According to documents submitted by Kitaoka Komuten Co., Ltd., it was found that for private sector general construction projects requiring the appointment of a dedicated chief engineer under Article 26, Paragraph 3 of the Construction Business Act and Article 27 of the Enforcement Order of the Construction Business Act, the company had appointed a dedicated technical engineer of the office as the chief engineer, as stipulated in Item 2 of Article 7 of the Act. This constitutes a violation of Article 26, Paragraph 3 of the Act and falls under Item 2 of Paragraph 1 of Article 28 of the same Act. Note: Since this violation occurred before the enforcement of the current Construction Business Act on December 13, Reiwa 6, the term used is 'dedicated technical engineer of the office' under the old law, not 'office technical engineer'.

On June 13, 2024, in Itabashi Ward, Tokyo, during air conditioner replacement work at a private residence, Worker B of Corporation A, along with two workers from the prime contractor Corporation Frontier Express, was working on the exterior wall of the residence. They had set up a five-meter ladder, climbed it, and were cutting the piping of an air conditioner at a height of 5.4 meters when they fell from the ladder. As a result, they sustained skull fracture, brain contusion, spinal injury, and experienced consciousness disturbance and paralysis of limbs. Consequently, Corporation Frontier Express was sentenced to a fine of 200,000 yen by the Tokyo Summary Court under Article 21, Paragraph 2 of the Industrial Safety and Health Act, with the judgment finalized on December 12, 2025. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Zero Home Design (Ltd.) has repeatedly failed to submit documents required under Article 11, Paragraph 2 of the Building Business Act within four months after each fiscal year over the past five fiscal years, despite being previously instructed by Okayama Prefecture. The company has again submitted the documents well beyond the deadline, with no improvement observed. This constitutes a violation of Article 11, Paragraph 2 of the Building Business Act, and an order to instruct is issued pursuant to Article 28, Paragraph 1 of the same Act.

Yamabe Motoyasu, the representative director of Hachibo Construction Co., Ltd., was found to have violated the Labor Standards Act by requiring workers at construction sites in Nara Prefecture to work overtime exceeding 40 hours per week and more than 8 hours per day excluding break time, from October 1, 2024, to March 31, 2025, despite no exemption applying to the company's operations. He was sentenced to a fine of 200,000 yen by the Katsuragi Summary Court on February 26, 2026, and the sentence was finalized. This conduct is recognized as corresponding to Item 3, Paragraph 1, Article 28 of the Construction Business Act.

The director of the construction company was sentenced to one year and four months of imprisonment with a three-year suspension for violating the Act on Penalties for Acts Inflicting Injury or Death by Automobiles (Act No. 86 of 2013). The sentence was finalized on November 28, 2025.

Sansen Corporation violated Article 3, Paragraph 1 of the Construction Business Act by undertaking multiple private construction projects in Tokyo exceeding the amount specified in Enforcement Order Article 1-2, Paragraph 1, during a period when it did not hold the necessary license. This constitutes a violation of Article 28, Paragraph 2, Items 2 and 3 of the Construction Business Act.

The construction company submitted false information in their business evaluation applications, including overstating contract amounts for multiple public works projects and falsely categorizing demolition work as general building work, with the intent to misrepresent their business performance.

The construction company violated Article 3, Paragraph 1 of the Construction Business Act by undertaking construction work with a contract amount exceeding the amount specified in Enforcement Order of the Construction Business Act, without obtaining the necessary permit for scaffolding and earthwork construction, in multiple private-sector projects.

Ogura Denki Service Ltd. violated the Construction Business Act by entering into subcontract agreements with entities operating without the necessary permits, knowing the circumstances, in private construction projects within Tokyo. Additionally, the company engaged in electrical work without the required permit, exceeding the amount specified in the Enforcement Order of the Act. These actions correspond to Article 28, Paragraph 1, Item 6; Paragraph 2, Item 2; and Paragraph 3 of the Construction Business Act.

Seibi Kogyo Co., Ltd. was fined on April 17, 2025, for violating the Building Industry Act Article 28, Paragraph 1, Item 3, by failing to implement collapse prevention and entry prohibition measures specified in the work plan during demolition work at Nishi-Shimbashi 1-chome, Minato-ku, Tokyo on June 16, 2022. The violations also contravened the Industrial Safety and Health Act Article 21, Paragraph 1, and the Industrial Safety and Health Regulations (Ministry of Labour Ordinance No. 32 of 1972), Article 517-14, Paragraph 1.

Nanzan Kaihatsu Co., Ltd. was found to have submitted construction history documents and lists of technical personnel that contained false information when applying for management review from 2022 to 2024. Based on this, the company applied for bidding qualification with Okinawa Prefecture, the public works client. This is recognized as corresponding to the provisions of Article 28, Paragraph 1, Item 2 of the Construction Business Act.

Fujiken Sekou Co., Ltd. was found to have submitted construction history documents and lists of technical personnel that contained false information when applying for the management review from 2022 to 2024. Based on this, the company applied for bid participation qualification with Okinawa Prefecture, the public works procurer. This is recognized as corresponding to the provisions of Article 28, Paragraph 1, Item 2 of the Construction Business Act.

Konoan Construction Co., Ltd. was found to have submitted construction history documents and lists of technical personnel that contained false information when applying for the management review from 2022 to 2024. Based on this, the company applied for bid participation qualification with Okinawa Prefecture, the public works procurer. This is recognized as corresponding to the provisions of Article 28, Paragraph 1, Item 2 of the Construction Business Act.

Kōnan Construction Co., Ltd. did not submit the necessary notification within two weeks of the fact occurrence, despite the fact that the site engineer was not permanently assigned and the standards listed in Article 7, Item 2 of the Construction Business Act were no longer met. This is recognized as a violation of Article 11, Paragraph 4 of the Construction Business Act and falls under the provisions of Article 28, Paragraph 1, main text of the same Act.

On May 16, 2025, Osato Construction Co., Ltd. and its representative director were each sentenced to a fine by the Miyazaki Summary Court for violations of the Industrial Safety and Health Act related to a fatal accident during a house fence installation project in Miyazaki City, Miyazaki Prefecture. Their sentences were finalized on January 14, 2026. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Endo Construction Co., Ltd. is engaged in construction work and was responsible for construction and safety management at the site of the 2024 prefectural road bridge maintenance (disaster-related) work commissioned by the Omachi Construction Office, Nagano Prefecture. Employee A, who is a site manager, was responsible for safety management at the site. On May 27, 2025, at the construction site within the general prefectural road Uruga-Ikeda Line, Worker B was instructed to perform shoulder repair work using a drag shovel. The site was a shoulder where guardrails had been removed for construction, and there was a risk of the shovel overturning or falling, which could endanger the worker. A guide was supposed to be positioned to direct the shovel to prevent accidents, but during the incident, no guiding was provided, and necessary measures to prevent danger from machinery were not taken. As a result, Endo Construction Co., Ltd. and A received summary orders imposing a fine of 200,000 yen each for violations of the Industrial Safety and Health Act, and their penalties were finalized. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The Executive Director of Koshin Kensetsu Kogyo Co., Ltd. provided a bribe of approximately 90,000 yen to a Urakawa town official in May 2025, under the pretext of receiving guidance on the estimated price of public works. On February 4, 2026, in Sapporo Summary Court, he was sentenced to a fine of 300,000 yen for the crime of bribery under Article 198 of the Penal Code, and the sentence was finalized on the same day. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The director of the construction company was sentenced to a fine of 200,000 yen for a violation of Article 204 of the Penal Code (Law No. 45 of 1907), and the sentence was finalized on December 24, 2025.

The construction company failed to meet the standards for a specified office technician as stipulated in Article 15, Paragraph 2 of the Building Business Act, as the individual was not a full-time employee dedicated solely to duties. Additionally, the company submitted false information in permit applications under Articles 5 and 6 of the Building Business Act, claiming that the individual was a specified office technician and was not receiving salary from the company, despite not being a full-time employee. The company also filed a notification that it had abolished all permits for specified construction businesses, which is a violation of Article 12, Item 5 of the Building Business Act.

Kuraishi Waterproof Industry Co., Ltd. and its representative director received summary fines from Takahashi Summary Court on February 13, Reiwa 8, for violations of the Industrial Safety and Health Act related to their business. Their sentences have been finalized. This constitutes a violation under Article 28, Paragraph 1, Item 3 of the Construction Business Act, and an instruction disposition is issued based on Article 28, Paragraph 1 of that Act.

Daido Construction Co., Ltd. and its representative director were each issued a summary order of fine by Takahashi Summary Court on February 13, 2026, for violations of the Industrial Safety and Health Act related to their business operations. Their sentences have been finalized. This constitutes a violation under Article 28, Paragraph 1, Item 3 of the Construction Business Act, and an instruction disposition is issued based on Article 28, Paragraph 1 of that Act.

Kimae Construction Co., Ltd. submitted a construction business license renewal application on February 4, 2021, without submitting a notification of change as required by Article 11, Paragraph 1 of the Construction Business Act for a director who had already assumed office on June 20, 2011. Additionally, the application lacked the director's details in the attached documents, such as the list of officers and the statement of address and date of birth of the license applicant (corporate officer, etc.). This was revealed by a notification of change regarding officers' appointment received on January 29, 2026. This violation contravenes Articles 5, 6, and 11 of the Construction Business Act, and an instruction order is issued based on Article 28, Paragraph 1 of the same Act.

K.K. S.H. Kogyo contracted for foundation work worth 130,273,000 yen for the HACCP factory warehouse expansion project from October 2024 to March 2025 without possessing the permits for civil engineering or earthwork construction. This constitutes a violation of Article 28, Paragraph 1, Item 2 of the Construction Business Act.

The former representative director of Shinko Jitsugyo Co., Ltd. was convicted of obstructing fair public bidding by using fraudulent means to interfere with the integrity of public contracts related to two bidding processes conducted by Omachi City, Nagano Prefecture, on August 21 and December 11 of Reiwa 6 (2024). On October 16 of Reiwa 7 (2025), the Nagano District Court sentenced him to one year in prison, with a three-year suspended sentence, for violating the Public Contract Act. This is deemed to correspond to items 2 and 3 of Article 28, Paragraph 1 of the Construction Business Act.

The representative director of Water System Co., Ltd. was sentenced to a fine under the Penal Code, and the execution of the sentence was completed on August 14, 2025. This constitutes a violation of Article 29, Paragraph 1, Item 2 of the Construction Business Act.

The construction company loaded liquefied petroleum gas onto its work vehicle and transported it within Kitami City. The loading and transportation methods did not comply with technical standards prescribed by the Ministry of Economy, Trade and Industry regulations, resulting in violations of the High Pressure Gas Safety Act and Liquefied Petroleum Gas Safety Regulations. On February 9, 2026, a summary order was issued by the Kitami Summary Court, resulting in a fine of 100,000 yen. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

On July 17, 2024, at a house demolition site in Oita Prefecture, the company failed to implement necessary safety measures to prevent falls of workers performing gas welding on steel frames at a height of approximately 3.3 meters on the second floor of a house. Specifically, they did not install protective netting or require workers to use fall prevention equipment, despite the risk of falling and the difficulty of installing barriers. The company and its representative director were each issued a summary order of a 200,000 yen fine by the Oita Summary Court for violations of the Industrial Safety and Health Act, with the sentence finalized on December 17, 2024. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Aiba Construction Co., Ltd. was subject to a bankruptcy proceeding decision by the Shizuoka District Court at 10:00 a.m. on May 2, 2025. This constitutes a violation of Article 29, Paragraph 1, Item 5 of the Construction Business Act.

Officers of Nishiyo Kogyo Co., Ltd. were convicted of violating the Waste Management and Public Cleansing Law (Law No. 137 of 1970) and sentenced to a fine of 400,000 yen by the Himeji Summary Court. The sentence was finalized on July 13, 2024. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Yūgō Kaisha Egg entered into subcontracting agreements exceeding the statutory amount without holding a specific construction business license for construction work directly commissioned from the client. This is considered a violation of Article 16, Item 1, and falls under Article 28, Paragraph 1, of the Construction Business Act.

Officers of Daruma Shoten Ltd. were convicted of violating the Waste Management and Public Cleansing Law (Law No. 137 of 1970) and sentenced to a fine of 300,000 yen by Kakogawa Summary Court, with the sentence finalized on July 14, 2023. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Yamashita Manufacturing Co., Ltd. entered into a subcontract agreement for construction work directly commissioned by a client without holding a license for specified construction business, and the total subcontract amount exceeded the amount specified by government ordinance under Article 3, Paragraph 1, Item 2 of the Building Business Act. This is recognized as a violation of Article 16, Item 2, of the same Act and falls under Article 28, Paragraph 1.

An employee of Kobayashi Construction Co., Ltd. was convicted of obstructing public contract-related bidding processes under the crime of obstruction of public contract proceedings, by the Chiba District Court on January 15, 2026, receiving a sentence of one year in prison (with a three-year suspension). The sentence was finalized on January 30, 2026. This constitutes a violation of Article 28, Paragraph 1, Items 2 and 3 of the Act against Unjustifiable Premiums and Misleading Representations.

Kosei Industry Co., Ltd. has previously been instructed by Okayama Prefecture for failing to submit documents required under Article 11, Paragraph 2 of the Construction Business Act within four months after each fiscal year over the past five fiscal years. Despite this, the company has again submitted the documents well beyond the deadline, with no improvement observed. This constitutes a violation of Article 11, Paragraph 2 of the Construction Business Act, and an order to instruct is issued pursuant to Article 28, Paragraph 1 of the same Act.

In late June of Reiwa 6 (2024), Yuichiro Kosaka, then CEO of Tano Sangyo Co., Ltd., received secret information regarding the minimum bid price for the Hirai Elementary School Gymnasium Major Renovation Construction Project from Eio Tsukamoto, Vice Mayor of Fujioka City, by phone. Around July 3, Reiwa 6, Yuichiro Kosaka instructed Tano Sangyo Co., Ltd. to submit a bid equal to the minimum bid price and on July 4, the company was awarded the contract for the project. This involved using fraudulent means and disclosing confidential information related to the bid to unfairly influence the contract award. On October 7, Reiwa 7, the Maebashi District Court sentenced him to 1 year and 6 months in prison, with a three-year probation, and the sentence was finalized.

Futaba Manufacturing Co., Ltd. was involved in a tank accessory inspection equipment construction project in Oga City, Akita Prefecture, where on May 29, 2023, a generator's oil pan fell during lifting with a crane and collided with a worker inside the tank, resulting in death. The company failed to implement measures to prevent falling objects, such as setting up restricted entry zones, despite the risk of falling causing danger to workers. Although the oil pan was previously unfastened from the generator, it was not securely removed, and the company neglected its duty to prevent falling, leading to the oil pan dropping and causing the worker's death. On September 18, 2025, the Oga Summary Court sentenced the company to a fine of 300,000 yen and one employee to a fine of 500,000 yen for violations of the Industrial Safety and Health Act and for occupational negligence resulting in death. This case is recognized as applicable under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Kabushiki Kaisha Hokuei Kensetsu did not assign a chief technical officer to a private construction project in Hachioji City, Tokyo, contracted on April 30, Reiwa 6 (2024). This violates Article 26, Paragraph 1 of the Building Business Act and falls under Item 2, Paragraph 1, Article 28 of the same Act, making it subject to a business suspension order under Paragraph 3 of that article.

On March 9, 2025, at the site of the auxiliary public road reconstruction project (National Route Collaboration) No. 19 (Koizumi No. 3 culvert work) in Azuma District, Higashi Azuma Town, Azuma District, workers including Worker A were used to install approximately 1.07 tons of U-shaped gutters. Worker A was assigned to operate a mobile crane with a lifting capacity of 2.9 tons without possessing a licensed crane operator's license or having completed the small mobile crane operation skills training, and there was no statutory exemption. As a result, violations of the Labor Safety and Health Regulations and the Crane Safety Regulations were identified, leading to a formal document submission. The Tochinojo Summary Court sentenced a fine on January 24, 2026, which was finalized.

Maki Industries Co., Ltd. violated Article 27-23, Paragraph 1 of the Construction Business Act by directly accepting demolition work from Kadogawa Town without undergoing the management review related to demolition work as stipulated in that paragraph. This constitutes a violation of Article 28, Paragraph 1, Item 2 of the Construction Business Act.

On May 29, 2023, at a construction site in Oita Prefecture, an employee of N.S.O. Ltd. sustained an injury or illness during work and was absent for more than four days. Despite this, the company and its representative failed to submit the required worker injury and illness report to the Oita Labor Standards Inspection Office by October 14, 2025, as mandated by law. They each received a summary order of a 200,000 yen fine from the Oita Summary Court for violating the Industrial Safety and Health Act, and the sentence was finalized. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Nonai Glass Co., Ltd. entered into a subcontracting agreement exceeding the scope of minor construction defined in the Enforcement Order of the Construction Business Act, despite not having obtained the permit required under Article 3, Paragraph 1 of the Construction Business Act. This constitutes a violation of the main text of Article 28, Paragraph 1 of the Construction Business Act.

Because the location of the business office could not be confirmed, a public notice was issued in Kanagawa Prefecture Public Notice No. 682 on January 23, Reiwa 8, but no application was received from the construction company within 30 days. This constitutes a violation of Article 29-2, Paragraph 1 of the Construction Business Act.

1. Delay in notification of business closure (violation of Article 12, Item 5 of the Act): The business owner failed to notify the closure of the electrical contracting business (specified) within 30 days after closing. The business was closed on October 1, 2023, but the notification was only submitted on November 20, 2025, over two years later. 2. Deficiency in renewal permit application (violations of Article 5, Items 5 and 6 of the Act): The application for renewal did not include the name of the designated technician (current office technician) as required, nor the construction industry for which the permit was sought. Between the renewal application submitted on September 12, 2023, and the permit issued on November 10, 2023, the designated technician for the electrical contracting business (specified) was absent, yet the renewal permit was granted without correction. 3. Contracting without permit for non-minor work (violation of Article 3 of the Act): The business engaged in non-minor electrical work after the business was closed on October 1, 2023, despite not having a valid permit.

The officer of Kusakari Construction Co., Ltd. was sentenced to imprisonment or a more severe penalty on September 5, 2025, and it was found that less than five years have passed since the completion of the sentence or the person no longer being subject to the sentence. This corresponds to Article 29, Paragraph 1, Item 2 of the law.

On June 20, 2024, at a steel frame demolition project in Kamiogi 1-chome, Suginami City, Tokyo, a concrete block that was part of the ceiling unexpectedly fell during welding work on corrugated sheets on the third-floor roof, striking a worker on the first floor. As a result, Uchida Construction Industry Co., Ltd. and its representative director were each fined 200,000 yen by the Tokyo Summary Court for violations of Article 21, Paragraph 2, and Article 61, Paragraph 2, of the Industrial Safety and Health Act. The court ruling was finalized on November 18, 2025. This incident falls under Item 3 of Paragraph 1 of Article 28 of the Construction Business Act.

The representative director of Kunitada Denki Co., Ltd. submitted false qualification certificates during the construction business license application, claiming to possess the necessary qualifications for a designated technical engineer as required by the Building Business Act. Despite not having the qualifications, they presented certificates including a first-class architectural construction management engineer certificate and a first-class architect license, and obtained the license on November 6, 2015, through fraudulent means. The license was also renewed on November 6, 2020, under the same false pretenses. This constitutes a violation under Article 29, Paragraph 1, Item 7 of the Act.

The director of the construction company was sentenced to three months of imprisonment with a three-year suspension for violating the Road Traffic Act (Act No. 105 of 1960), and the sentence was finalized on June 11, 2024.

On November 23, 2023, an employee of Tokuban Co., Ltd. fell from a ladder and sustained injuries requiring more than four days of leave during dismantling and installation work of ducts on another company's premises. As a result, the former director (who was a director at the time of the injury) and the company failed to submit the Worker Injury and Illness Report to the Tokushima Labor Standards Inspection Office without delay by December 22, 2024, and did not report as required by law. Consequently, both the company and the former director received summary fines for violations of the Industrial Safety and Health Act, with the company's penalty finalized on December 3, 2025, and the former director's penalty finalized on December 4, 2025.

On June 30, 2025, during a management review based on that date, false documents were attached and a false application was submitted.

It was found that the former director of Smileful Home Co., Ltd. was sentenced to a fine for assault, and the sentence was finalized on October 11, 2024. This corresponds to Item 2, Paragraph 1, Article 29 of the Act against Unjustifiable Premiums and Misleading Representations.

The construction company placed individuals who do not meet qualification requirements as chief engineers on projects requiring the appointment of a chief engineer under Article 26, Paragraph 1 of the Construction Business Act. This is deemed to fall under Item 2 of Paragraph 1 of Article 28 of the Construction Business Act.

The company was prosecuted by the Osaka District Public Prosecutors Office for conducting illegal overtime work beyond the extended hours under the labor-management agreement based on Article 36 of the Labor Standards Act, for two workers in the headquarters construction department. The company and two officers were issued a summary order of a 300,000 yen fine on December 4, 2024. This is recognized as corresponding to Item 3, Paragraph 1, Article 28 of the Construction Business Act.

The construction company above entered into subcontract agreements exceeding the amount specified in Enforcement Order for the Construction Business Act, with persons not holding a construction business license. This constitutes a violation of Article 28, Paragraph 1, Item 6 of the Construction Business Act.

The director of the construction company was sentenced to two years of imprisonment with a three-year suspension for a violation of Article 235 of the Penal Code (Law No. 45 of 1907), and the sentence was finalized on June 26, 2024.

The director of the construction company was sentenced to a fine of 100,000 yen for a violation of Article 204 of the Penal Code (Law No. 45 of 1907), and the sentence was finalized on November 9, 2023.

Construction company Matsuo Painting Co., Ltd. operated construction business without a license. In a public works project commissioned by Fukuoka Prefecture, the company altered a copy of a permit notification issued to another party, creating a duplicate that appeared to be an authentic permit notification in form and appearance. The company presented this to a primary subcontractor, leading to the mistaken belief that it was a licensed contractor. On June 23, 2022, the company entered into a subcontract agreement exceeding the scope of minor construction work as defined by the Enforcement Order of the Act. This conduct violates Article 3, Paragraph 1 of the Construction Business Act and falls under Item 2 of Paragraph 2 of Article 28 of the same Act.

On May 16, 2023, at a new construction project in Shinagawa Ward, Tokyo, Shinagaki Co., Ltd. used a pile driver exceeding the maximum allowable load, causing it to overturn and fall onto nearby vehicles. A worker inside a vehicle was injured when struck. As a result, Shinagaki Co., Ltd. was fined 200,000 yen by the Tokyo Summary Court for violating Article 20 of the Industrial Safety and Health Act, and the judgment was finalized on June 24, 2025. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The director of Shiose Co., Ltd. disposed of approximately 6.2 tons of construction and industrial waste, including debris and waste plastics, at a construction site in Koshigaya City, Saitama Prefecture, between November 27 and December 4, Reiwa 6, without the statutory exemption. As a result, a fine of 500,000 yen was finalized for violating the Waste Management and Public Cleansing Law (Koshigaya Summary Court, June 4, Reiwa 7). This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Because the location of the office of Yugen Kaisha Sekigumi could not be ascertained, it was announced in Shizuoka Prefecture Public Notice No. 690 dated January 16, Reiwa 8, but no application was received from the company within 30 days from the date of the announcement.

The construction company failed to take necessary measures to prevent hazards related to fall risks at a Tokyo-based air conditioning installation site where they were the prime contractor. As a result, on March 10, 2022, a worker (an employee of a subcontractor) fell from a height and subsequently died. The company and supervising engineers received summary fines from the Tokyo Summary Court on March 19, 2025, for violations of the Industrial Safety and Health Act and for professional negligence resulting in death, and these penalties were finalized. This is recognized as corresponding to Item 3, Paragraph 1, Article 28 of the Construction Business Act.

Marutomo Kaihatsu Corporation violated Article 26, Paragraph 3 of the Construction Business Act by assigning persons who must be dedicated chief engineers to multiple sites, including 15 private construction projects in Iwata City, Shizuoka Prefecture, contrary to legal requirements. This is recognized as falling under Item 2, Paragraph 1, Article 28 of the same Act.

The subject business operator submitted a false worker injury report to the Odate Labor Standards Inspection Office, claiming that an injury occurred in their warehouse, despite their worker having fallen from a ladder at a construction site in Akita Prefecture on May 27, 2022, and having fractured their right heel. The operator and involved employees received summary fines for violations of the Industrial Safety and Health Act on June 6, 2025, and the penalties were finalized. This is recognized as applicable under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Falsification of the specific self-inspection record form related to drag shovels occurred. As a result, Iitaka Block Industry Co., Ltd. and its representative director were each sentenced to a fine of 200,000 yen by the Tokyo Summary Court for violations of Article 45, Paragraph 2 of the Industrial Safety and Health Act, with the judgment finalized on July 9, 2025. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The person engaged in the construction industry contracted construction work for the 2025 Japan International Exposition without the required permit, in violation of Article 3, Paragraph 1 of the Construction Business Act, and the contract amount exceeded the amount specified in Enforcement Order of the Construction Business Act, Article 1-2.

Kyo-sei Denki Co., Ltd. failed to submit a worker injury and illness report to the competent Labor Standards Inspection Office Chief following a work-related injury resulting in more than four days of leave that occurred during electrical equipment construction in Sodegaura City, Chiba Prefecture, on March 30, 2023. Regarding this matter, the company and one of its Chiba branch managers were each sentenced to a fine of 200,000 yen for violations of the Industrial Safety and Health Act by the Kisarazu Summary Court on August 29, 2025, and the sentences were finalized. This is recognized as corresponding to Item 3, Paragraph 1, Article 28 of the Construction Business Act.

The person engaged in the construction industry contracted construction work for the 2025 Japan International Exposition without the required permit, in violation of Article 3, Paragraph 1 of the Construction Business Act, and the contract amount exceeded the amount specified in Enforcement Ordinance of the Construction Business Act, Article 1-2.

A person engaged in the construction industry contracted construction work for the 2025 Japan International Expo without the required permit, in violation of Article 3, Paragraph 1 of the Construction Business Act, and the contract amount exceeded the amount specified in the Enforcement Order of the Construction Business Act, without obtaining the necessary authorization.

An employee of Paruto Corporation was fined by the Tokushima Summary Court on September 19, 2025, for violations of the Waste Management and Public Cleansing Law related to the company's operations, and the sentence was finalized on October 7, 2025. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

O.D.A. Corporation applied for a construction business license on August 18, 2020, and received a general construction business license on November 11, 2020. Subsequently, because the technical officer at the main office could not be permanently stationed there, they hired a new technical officer. However, they failed to submit a notification of change as required by Article 11, Paragraph 4 of the Construction Business Act. This constitutes a violation of Article 7, Paragraph 1, Item 2 and Article 11, Paragraph 4 of the Act, and is recognized as corresponding to the provisions of Article 28, Paragraph 1, main text of the same Act.

Because the location of Suzuki Housing Equipment's sales office could not be determined, it was announced in Shizuoka Prefecture Public Notice No. 688 dated January 9, Reiwa 8, but no application was received from the company within 30 days from the date of the announcement.

The former representative director of Hirose Corporation was convicted of obstructing bidding in a public contract auction (Article 96-6, Paragraph 1 of the Penal Code) and received a sentence of one year in prison (with a three-year probation) from the Oita District Court on September 29, 2025, with the sentence finalized. This constitutes a violation of Article 28, Paragraph 3 of the Construction Business Act (Item 3, Paragraph 1 of the same article).

The representative director of Shinmei Greenery Co., Ltd. was sentenced on November 17, 2025, to one year in prison with a three-year suspension for obstructing a public contract auction bid, and the sentence was finalized on December 2, 2025. As a result, they fall under the disqualification criteria specified in Article 8, Item 7 of the Construction Business Act. This also corresponds to Item 2 of Paragraph 1 of Article 29 of the Construction Business Act.

The director of the construction company was sentenced to a fine of 70,000 yen for violating Article 208 of the Penal Code (Law No. 45 of 1907), with the sentence finalized on March 24, 2023. Additionally, the construction company submitted false information in the permit application under Article 5 of the Construction Business Act and in documents under Article 6, Paragraph 1 of the same law, and received an update of the permit under Article 3, Paragraph 3 of the Act.

Between October 30, 2013, and December 15, 2025, an individual registered as a technical staff at the Katsuragi Construction Company was found to have served as a licensed real estate transaction agent requiring exclusive appointment at another company with a real estate license. During this period, it is not recognized that the individual was solely engaged in duties at Katsuragi Construction Company. Therefore, it is considered to violate Article 7, Paragraph 2 of the Building Business Act for at least the permitted construction types of paving, painting, waterproofing, interior finishing, and water supply facilities. This constitutes a violation of the main text of Article 28, Paragraph 1 of the Building Business Act.

Hayami Heavy Machinery Co., Ltd. and its site supervisor were each fined 200,000 yen for violating the Industrial Safety and Health Act after failing to take necessary safety measures at a demolition site, where workers were exposed to fall hazards from a height of over 2 meters without appropriate fall prevention equipment. The fines were finalized on September 27, 2025. This is recognized as applicable under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Minamoto Construction Workshop Co., Ltd. and its employees received summary orders of fine from Kurashiki Summary Court on November 6, Reiwa 7, for violations of the Industrial Safety and Health Act related to their business operations, and their sentences have been finalized. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act, and an instruction disposition is issued based on Article 28, Paragraph 1 of that Act.

K.K. K.Y.K. submitted documents under Article 11, Paragraph 2 of the law that contained false information regarding the sales figures of its side businesses. This constitutes a violation of that article. Additionally, using financial statements that falsely reported side business sales figures, K.K. K.Y.K. applied for a management review on July 25, 2024, with the review date set as that day, and obtained a management review result notification based on this application. Using this notification, the company secured qualification to participate in bids in Miyagi Prefecture. This violates Articles 27-24, Paragraph 3, and 27-26, Paragraph 3 of the law, and falls under Item 2 of Article 28, Paragraph 1 of the law.

The representative director of Nagata Construction Co., Ltd. was convicted of violating the Industrial Safety and Health Act for failing to take necessary safety measures, such as requiring workers at a demolition site in Kashiwa City, Nara Prefecture, to use fall prevention equipment. The conviction was finalized. This is recognized as applicable under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The representative director of PRESI Co., Ltd. was sentenced to two years of imprisonment with a three-year suspension on December 21, 2023, by the Fukui District Court for violations of the Stimulant Control Act and the Narcotics and Psychotropics Control Act, and the sentence was finalized on January 5, 2024. This constitutes a violation of Article 29, Paragraph 1, Item 2 of the Construction Business Act.

The representative director of Tsuruoka Watabe Construction Co., Ltd. was sentenced to one year of imprisonment under Article 25, Paragraph 1, Item 14 of the Act on Waste Disposal and Public Cleaning (Act No. 137 of 1970), with the sentence finalized on December 26, 2025. This constitutes a violation of Article 29, Paragraph 1, Item 2 of the Construction Business Act.

On April 19, Reiwa 7 (2025), Hirota Construction Co., Ltd., and its representative director, were involved in an incident at a water channel construction site ordered by the prefecture, where a worker lost balance while operating a drag shovel, fell, and was crushed, resulting in death. They were found to have operated the drag shovel without assigning a guide, thereby failing to take necessary measures to prevent danger from machinery. On December 4 of the same year, they received a summary fine from Matsuyama Summary Court for violating the Industrial Safety and Health Act, and the sentence was finalized. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

Senden Corporation repeatedly undertook construction work that does not qualify as minor construction work specified in the proviso of Article 3, Paragraph 1 of the Construction Business Act, despite not having obtained a construction business license as required by the same law. This constitutes a violation of Item 2, Paragraph 2, Article 28 of the Construction Business Act.

FT Solution Co., Ltd. contracted for painting work in March of Reiwa 7 (2025), violating Article 3, Paragraph 1 of the Construction Business Act by exceeding the scope of minor construction as defined in Enforcement Ordinance Article 1-2, Paragraph 1. This constitutes a violation of Item 2, Paragraph 2, Article 28 of the Construction Business Act.