Construction Business Act Enforcement Actions in Japan

The company Oshima Co., Ltd. was ordered to cease operations for seven days by the Kyushu Regional Development Bureau due to violations of the Construction Business Act, including operating without proper permits and exceeding the scope of minor construction work in subcontracting within Saga Prefecture.

岩手県は、下舘建設株式会社に対し、建設業法第28条第1項第3号に基づき指示を行った。これは、同社従業員が安全措置を怠り、労働安全衛生法違反により罰金判決を受けた事案に関するものである。

JR Kyushu Engineering Co., Ltd. was found to have contracted subcontractors for mechanical equipment installation work in Oita Prefecture without the necessary construction business license, exceeding the scope of minor construction work as defined by law. This is recognized as a violation under Article 28, Paragraph 1, Item 6 of the Construction Business Act.

The company, 株式会社コバテクノロジー, was found to have entered contracts exceeding the scope of minor construction work without the necessary permits under the Building Business Act in multiple private projects within Shizuoka Prefecture. This constitutes a violation of Article 3, Paragraph 1 of the Act and falls under Article 28, Paragraph 2, Item 2 of the same law.

On May 13, 2025, Nakagawa Kiso Kogyo Co., Ltd. was ordered by Hokkaido authorities to cease certain construction activities after a fatal accident involving a drag shovel at a site in Kitahiroshima. The company was found to have violated safety regulations by not establishing an appropriate work plan considering terrain and geological conditions, leading to a worker’s death. The company and its officers were fined by the Sapporo Summary Court. This action was based on violations of the Construction Business Act and the Industrial Safety and Health Act.

In 2026, the company and its officers were fined for violating the Industrial Safety and Health Act by providing false reports regarding a workplace injury incident, which is considered a violation under the Construction Business Act Article 28, Paragraph 1, Item 3.

The former director of Kabushiki Kaisha Fukazawa Denso was convicted of obstructing public procurement processes related to a construction project in Katagami City, Akita Prefecture, and received a summary fine on May 27, 2026. As a result, the company is subject to a one-year suspension of construction-related business activities involving public works, from July 25, 2026, to July 24, 2027, by order of Akita Prefecture.

The Tokyo Metropolitan Government has suspended the business operations of Taisho Home Co., Ltd. for three days from July 27 to July 29, 2026, due to violations of the Construction Business Act.

The company Yono Construction Co., Ltd. has repeatedly failed to submit construction-related documents within the required four months after each fiscal year, despite prior guidance from Okayama Prefecture. This ongoing non-compliance violates Article 11, Paragraph 2 of the Construction Business Act. As a result, the prefecture has issued an instruction under Article 28, Paragraph 1 of the Act.

Tokyo Metropolitan Government issued a business suspension order to Family Workshop Inc. for operating without the necessary construction permits during multiple private projects in Tokyo, violating the Building Business Act. The suspension covers all construction activities from July 27 to July 30, 2026.

The Tokyo Metropolitan Government has suspended the operations of ITEC Home Corporation for four days from July 27 to July 30, 2026, due to violations of the Construction Business Act by entering into contracts exceeding the statutory amount without proper licensing.

The Tokyo Metropolitan Government revoked the construction business license of MARISS Corporation due to the inability to confirm the location of its business office, with no objections filed within 30 days of public notice, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The Tokyo Metropolitan Government revoked the construction business license of Kabushiki Kaisha Aiwa due to inability to confirm the location of its main office, with no objections filed within 30 days of public notice, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The Tokyo Metropolitan Government revoked the construction business license of株式会社ＡＳＵ ＷＯＲＫＳ due to the inability to confirm the company's office location, with no objections filed within 30 days of public notice, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The Tokyo Metropolitan Government has ordered a business suspension for Toyota Housing Co., Ltd. due to violations of the Construction Business Act, specifically for contracting electrical work without proper permits in private projects within Tokyo.

Tokyo Metropolitan Government imposed a business suspension on Urban Corporation for violating the Building Business Act by contracting electrical work without proper permits and exceeding the contract amount limit.

The Tokyo Metropolitan Government has suspended the construction company, Sugasawa Komuten Co., Ltd., for violating the Building Business Act by entering into contracts exceeding the statutory amount without proper authorization for painting work, which constitutes grounds for suspension under the law.

The Tokyo Metropolitan Government has imposed a business suspension on Yugen Kaisha Kobo-sha for violating the Construction Business Act by contracting subcontractors without proper permits in multiple private projects within Hokkaido.

The Tokyo Metropolitan Government has ordered a business suspension for KAWAGUCHI NOGUCHI SAKAN KOGYO LLC due to violations of the Construction Business Act, specifically for contracting electrical work without proper permits and exceeding the contract amount limits.

Tokyo authorities suspended the business license of株式会社アルセットサービス for violating the Construction Business Act by entering into contracts exceeding the permitted amount without proper authorization.

Tokyo Metropolitan Government has ordered a business suspension for Hashimoto Kogyo Co., Ltd. due to violations of the Construction Business Act, specifically for contracting construction work exceeding the statutory amount without proper licensing. The suspension covers all construction business activities from July 27 to July 29, 2026.

The director of Ueda Construction Co., Ltd. was convicted of violating the Waste Management and Public Cleansing Law (Law No. 137 of 1970) and sentenced to a fine of 500,000 yen by the Kashiwa Summary Court, with the sentence finalized on April 3, 2026. This violation falls under Article 28, Paragraph 1, Item 3 of the Construction Business Act. As a result, the Hyogo Prefecture has suspended the company's business operations, including prohibiting the company's officers from engaging in business during the suspension period.

The Kinan Pipework Cooperative was revoked its construction business license by Wakayama Prefecture on July 13, 2026, due to a criminal conviction of a director under the Penal Code Article 208, which is grounds for license cancellation under the Construction Business Act Article 29, Paragraph 1, Item 2.

The Tokyo Metropolitan Government issued a business suspension order to Japan 3D Printer Co., Ltd. for operating without the necessary construction license and entering into contracts exceeding the statutory amount without approval, violating the Building Business Act Articles 3 and 28. The suspension covers all construction business activities from July 27 to July 30, 2026.

On January 20, 2025, Sun Corporation House Industry was fined 300,000 yen for violating the Building Industry Act by failing to implement safety measures during residential renovation work in Yanagawa City, Fukuoka Prefecture. The company was ordered to improve safety compliance and report actions taken.

The Chubu Regional Development Bureau issued an administrative instruction to EC Center Co., Ltd. for conducting construction work without the required license and entering subcontract agreements exceeding the statutory amount with unlicensed entities, in violation of the Construction Business Act Article 28, Paragraph 1, Item 6.

株式会社スズキピーシー was fined 200,000 yen for violating the Building Industry Law by submitting a false workers' injury report after an incident on June 7, 2023, where a worker sustained an open fracture of the middle finger's proximal phalanx during work at a factory site. The company and its representative received a summary order on January 21, 2026, which was finalized, and the violation is recognized under Article 28, Paragraph 1, Item 3 of the Building Industry Law.

The Osaka Prefectural Government revoked the construction business license of株式会社ASM due to non-compliance with legal requirements regarding the qualification of its site engineer as of March 1, 2026.

The representative director of Sato Construction Co., Ltd. was fined for interfering with a public construction bid in May 2025 and was subject to a one-year suspension of business activities related to public construction projects by Aichi Prefecture from July 2026 to July 2027 under the Construction Business Act.

The former representative director of Yugen Kaisha Hattori Komuten was convicted in March 2024 for obstructing fair public bidding through fraudulent means related to a construction project in Yatomi City, Aichi Prefecture. As a result, the company was ordered to suspend construction business activities for one year from July 18, 2024, to July 17, 2025, under the Construction Business Act Article 28, Paragraph 3.

Yatomi Construction Co., Ltd.'s representative was fined for interfering with public bidding processes in May-June 2023, leading to a suspension of business activities from July 2026 to July 2027 under the Construction Business Act.

The representative director of Ohama Construction Co., Ltd. was fined for obstructing fair public bidding procedures related to a construction project in Yatomi City, Aichi Prefecture, in March 2026, based on a summary order by the Nagoya Summary Court. As a result, the company’s construction business license was suspended for one year from July 18, 2026, to July 17, 2027, under the Construction Business Act, Article 28, Paragraph 3.

The company, 大豊地建株式会社, was issued an administrative instruction by Saitama Prefecture for violations of the Construction Business Act, including exceeding subcontracting limits without proper authorization and failing to provide written contracts as required.

The construction company株式会社久樹建工 had its construction license revoked by Osaka Prefecture after it was dissolved following a bankruptcy decision on October 9, 2025.

The director of株式会社Ａ.Ｓ.Ｅプランニング was fined for violations of the Labor Safety and Health Act related to safety training and protective measures when handling high-voltage charging circuits. The company and director were sentenced on April 11, 2026, and the case is recognized as a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The Tottori Prefecture revoked the construction business license of Hamada Kogyo Co., Ltd. on June 30, 2026, due to the company's officers violating laws related to criminal income transfer prevention and being subject to disqualification under the Construction Business Act.

The representative of Dai Sei Construction LLC, Kiyohide Oshima, was ordered to pay a fine of 200,000 yen for violations of the Construction Business Act related to failure to report a work-related injury and illness, with the penalty confirmed on December 18, 2025.

The Osaka Prefecture revoked the construction business license of Life Tech Innovation Co., Ltd. on June 25, 2026, due to non-compliance with the requirements for a site engineer as stipulated in the Building Business Act, Article 7, Paragraph 2, as of February 1, 2025.

The Osaka Prefecture has revoked the construction business license of Negoro Kogyo Co., Ltd. due to a director's violation of the Road Traffic Act resulting in a four-month prison sentence, finalized on September 14, 2021.

The Osaka Prefectural Government revoked the construction business license of Kabushiki Kaisha Kawabuchi Kogyo on June 23, 2026, due to the death of key personnel and failure to meet licensing standards under the Building Business Act.

The company FUKUSHO was ordered to cease operations for 15 days by the Kyushu Regional Development Bureau due to violations of the Construction Business Act, specifically for assigning unqualified personnel as chief engineers in construction projects in Tokyo.

The Shizuoka Prefectural Government has ordered a 10-day suspension of business activities for Shinwa Electric Industry Co., Ltd. due to violations of the Construction Business Act, including unlicensed contracting beyond minor work limits and falsification of permit documents.

Shinwa Electric Industry Co., Ltd. was instructed by Shizuoka Prefecture to take measures to prevent recurrence of violations involving falsified construction permit documents and fictitious permit numbers, including internal staff notification and ongoing training. The company was also subject to a business suspension order issued on the same day.

The Kinki Regional Development Bureau issued a directive to Kanadevia Engineering Co., Ltd. for placing a designated technical officer at a construction site, which is a violation of the Construction Business Act Article 28, Paragraph 1.

The Kyushu Regional Development Bureau has imposed a suspension of business activities on Tokubu Kousan Co., Ltd. for violating the Construction Business Act by engaging in construction work without proper permits and exceeding the scope of minor construction work allowed without a permit, in relation to landscaping projects in Fukuoka Prefecture.

The Kyushu Regional Development Bureau issued a regulatory order to Tokubu Kousan Co., Ltd. for violations of the Construction Business Act, including improper placement of technical staff and concurrent duties of chief engineers, on June 18, 2026.

The Fukuoka Prefectural Government issued a business suspension order to (Yū) Shinonome-gumi for operating construction activities without proper permits and entering into subcontract agreements exceeding the scope of minor construction work, violating Article 28, Paragraph 1, Item 6 of the Construction Business Act. The suspension period is from July 1 to July 10, 2026.

Fukuoka Prefecture imposed a business suspension on RK KAWATA for contracting construction work exceeding the scope of minor construction without proper licensing, violating the Construction Business Act.

Fukuoka Prefecture imposed a business suspension on Ruito Construction Co., Ltd. for violating the Construction Business Act by contracting non-minor construction work without proper licensing in Kitakyushu City. The suspension lasts from July 1 to July 3, 2026.

In June 2025, the officers of Sugiyama Heavy Machinery Co., Ltd. were fined 200,000 yen each for violations of the Industrial Safety and Health Act related to safety management at a construction site in Shizuoka Prefecture. The Hamamatsu Summary Court confirmed the fines in April 2026. The violations involved failing to implement necessary safety measures for workers using mobile ladders, including slip prevention devices, which is recognized as a violation under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The company, Honda Kogei, has repeatedly failed to submit construction-related documents within the required four months after each fiscal year, despite previous guidance from Okayama Prefecture. This ongoing non-compliance violates Article 11, Paragraph 2 of the Construction Business Act, and has resulted in an administrative instruction under Article 28, Paragraph 1 of the same law.

The Miyagi Prefectural Government canceled the construction business license of INLE Corporation due to failure to notify the location of its office within the statutory period after public notice.

The representative director of Kobukubo Rebar Construction Co., Ltd. was subject to a business suspension order by the Kanto Regional Development Bureau due to violations of labor laws, including exceeding permitted overtime hours without legal exemption, confirmed by a summary order with a fine of 300,000 yen each for the company and the director. This violation is recognized under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The Miyagi Prefectural Government canceled the general construction business license of Kabushiki Kaisha Taiga Kogyo on June 9, 2026, due to the company's failure to notify the prefecture of its business location within 30 days of public notice, as required by Article 29-2, Paragraph 1 of the Construction Business Act.

The construction license of Trust Works Inc. was revoked by Kanagawa Prefecture due to bankruptcy proceedings initiated by the Yokohama District Court on July 18, 2025, and confirmed on February 25, 2026, which falls under Article 29, Paragraph 1, Item 5 of the Construction Business Act.

In 2023 and 2024, Kikuno Sekigyo Co., Ltd. submitted false reports regarding worker injuries and made false statements during an inspection, violating the Construction Business Act and the Industrial Safety and Health Act. The company and its former representative were fined 200,000 yen each, and the violations are recognized under Article 28, Paragraph 1, Item 3 of the Construction Business Act.

The company, Yugen Kaisha Hosokawa Denko, was found to have violated the Construction Business Act by improperly assigning chief engineers during multiple projects in 2024 and 2022, including violations of the requirement for dedicated technical staff and concurrent assignments. The Fukui Prefecture has issued an administrative order requiring corrective measures to prevent recurrence.

The Okinawa General Bureau issued a business suspension order to American Engineering Corporation for installing unqualified technical personnel at construction sites over three fiscal years, in violation of the Construction Business Act, Article 28, Paragraph 1, Item 2.

Shizuoka Prefecture issued an administrative order to Tanaka Kogyo Co., Ltd. for operating construction business without meeting permit requirements after appointing an individual with a criminal sentence as an officer, and for failing to submit a change notification within 30 days of the officer's resignation.

The Hokkaido authorities revoked the construction license of Yugen Kaisha R. Fine Act on June 3, 2026, due to the company's director being found to meet the disqualifying criteria under the Building Business Act Articles 8 and 12.

The Osaka Prefectural Government canceled the construction business license of株式会社FOIL due to the company's director being convicted of criminal offenses under the Penal Code, with the conviction finalized on September 28, 2026.

The Akita Prefecture has issued an order to Funabashi Electric Partnership for violating the Construction Business Act by directly accepting construction work without undergoing management review, which is required by law.

The construction permit for Takumi Yō Waterproofing Co., Ltd. was revoked by Miyagi Prefecture on May 29, 2026, due to the company's former officer being convicted of a crime and not having exceeded five years since the completion of their sentence.

The construction permit for (有)石塚工業 was revoked by Fukuoka Prefecture on May 28, 2026, due to the company's representative's criminal conviction under the Penal Code, which constitutes grounds under the Construction Business Act.

Fukushima Prefecture issued an administrative disposition against Resilience Corporation for violating construction law requirements regarding the appointment of a full-time chief engineer at a water pipe improvement project in Iwaki City.

The representative directors of ITEC Corporation were fined for violations of the Waste Management Law and their license was suspended by the Ishikawa Prefectural Government from June 11 to June 17, 2026, for all construction-related activities.

On December 18, 2024, at a construction site in Nihonmatsu City, an employee of Abe Construction Co., Ltd. fell from a scaffold while attaching separators to formwork on the second floor of a building, resulting in serious injuries. The company and its site supervisor were fined 200,000 yen each for violations of the Building Industry Act and the Industrial Safety and Health Act. The incident was reported through the mutual reporting system of the Fukushima Labor Bureau.

The Shizuoka Prefecture has issued an instruction to Ito Shoji for contracting construction work without the necessary license, exceeding the scope of minor works permitted under the Building Business Act. This violation is recognized as a breach of Article 3, Paragraph 1 of the Act and falls under Article 28, Paragraph 2, Item 2 of the same law.

静岡県は、澤田工業に対し、建設業法第28条第2項に基づく指示を行った。これは、同社が建設業法第3条第1項の許可を得ずに民間工事の請負契約を締結したためである。

The company株式会社ATSUMI創建 was instructed by Shizuoka Prefecture for violating the Construction Business Act by contracting private construction work without the necessary permit, exceeding the scope of minor work defined by law.

The company,株式会社新都メンテナンス, was ordered to suspend operations for three days from June 5 to June 7, 2026, due to violations related to construction safety laws following a fatal accident during sewer pipe construction in Kochi Prefecture.

The Osaka Prefectural Government revoked the construction business license of Gearmax Corporation due to violations including improper staffing of designated site engineers and false application statements, compounded by a criminal conviction of a director.

The former representative director of Kabushiki Kaisha Otonami Kogyo was convicted of obstructing public contract bidding related to Choshi City projects and sentenced to 2 years and 6 months in prison, with a 4-year probation, confirmed on April 8, 2026. This led to a business suspension order under the Construction Business Act by Chiba Prefecture from May 21, 2026, to May 20, 2027.

The company, 和工建設株式会社, was subject to a business suspension order by Hokkaido due to violations related to false tax filings and legal violations under the Construction Business Act, following criminal convictions for tax evasion and related offenses.

The company, 正和運輸株式会社, was subject to a business suspension order by Hokkaido due to violations related to false tax filings by former directors, which also constitutes a violation of the Construction Business Act Article 28, Paragraph 1, Item 3.

The Osaka Prefectural Government has revoked the construction business license of Mizoguchi Kensou Co., Ltd. due to the criminal conviction of its director under the Penal Code. The license was canceled on May 19, 2026.

Chiba Prefecture fined Unokogyo Co., Ltd. and its site manager 300,000 yen for safety violations during demolition work at Ichihara City, Anegasaki Coast, on February 1, 2023, under the Construction Business Act Article 28, Paragraph 1, Item 3.

The Hokkaido authorities revoked the construction license of Komatsu Corporation on May 16, 2026, due to the company's director being found to meet disqualifying criteria under the Construction Business Act, Articles 8 and 12.

The Hyogo Prefecture revoked the construction business license of TOM Corporation on May 13, 2026, due to the inability to confirm the location of its office and representative, and the lack of response from the company within 30 days of public notice, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

In 2023, Komatsu Kogyo Limited was fined for failing to submit a worker injury report following a work-related injury at a construction site in Fukuoka Prefecture. The company and its representative were ordered to take corrective measures and report these actions to authorities. The fines were confirmed in December 2025.

The operator of Kōsābisu was prosecuted for incinerating industrial waste generated from construction work in a private incinerator, leading to a summary fine of 200,000 yen under the Waste Management and Public Cleansing Law. The operator was subject to a suspension of business activities from May 26 to June 1, 2026, by Shizuoka Prefecture.

Saitama Prefecture revoked the construction license of Kitasei Construction Co., Ltd. on May 11, 2026, due to failure to respond within 30 days after an announcement that the company's office location could not be confirmed, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

Saitama Prefecture revoked the construction license of Pentec Corporation due to failure to respond after public notice of unconfirmed business location, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The company '株式会社ワールドワイド' had its construction license canceled by Saitama Prefecture on May 11, 2026, due to failure to respond within 30 days after a public notice that its business office location could not be confirmed, as required by the Building Business Act Article 29-2, Paragraph 1.

The Saitama Prefectural Government canceled the construction license of Fujima Komusho on May 11, 2026, due to failure to receive any claims within 30 days after public notice that the company's office location could not be confirmed, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The Saitama Prefecture revoked the construction license of Upstep Corporation due to failure to respond within 30 days after an announcement that the company's business location could not be confirmed, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The Saitama Prefecture authorities canceled the construction business license of Sato Denki Corporation due to failure to receive any claims within 30 days after an announcement that the company's business location could not be confirmed, in accordance with Article 29-2, Paragraph 1 of the Construction Business Act.

The Saitama Prefectural Government canceled the construction business license of Sankyo Kenchiku Co., Ltd. due to a public notice regarding the unverified location of its main office, which remained unchallenged for over 30 days.

The Saitama Prefectural Government canceled the construction business license of Takagi Kandtetsu Industry Co., Ltd. due to failure to respond within 30 days after an announcement that the company's business office location could not be confirmed, as required by Article 29-2, Paragraph 1 of the Construction Business Act.

The Saitama Prefecture revoked the construction business license of Rstyle Corporation due to failure to receive any applications within 30 days after public notice that the company's business location could not be confirmed, as required by Article 29-2, Paragraph 1 of the Construction Business Act.

Nara Prefecture issued an administrative disposition against (株)中造園 for violating the Construction Business Act by assigning its management and technical staff to other companies' projects as site agents, which was not solely for their duties at 中造園.

In 2024, Saya Den Co., Ltd. was ordered by Saitama Prefecture to improve safety compliance after submitting false reports regarding a construction accident in Tochigi Prefecture. The company and its CEO were fined 200,000 yen each for violating the Construction Business Act, Article 28, Paragraph 1, Item 3.

The construction license of Toki-moku Ryokka Co., Ltd. was revoked by Kanagawa Prefecture on May 2, 2026, due to a violation related to a criminal conviction of an officer, which does not meet the required time elapsed since sentencing.

The Osaka Prefectural Government canceled the construction business license of Asakawa Corporation on May 1, 2026, due to the criminal conviction of its director for violating the Road Traffic Act, which resulted in a six-month prison sentence with a three-year probation, confirmed on September 25, 2024.

The company 'Life Sketch Co., Ltd.' was ordered to cease operations for 10 days by Nara Prefecture for conducting construction work without proper licensing.

The company, Okajima Densetsu Kogyo Co., Ltd., was ordered to suspend operations by Nara Prefecture for violating the Construction Business Act by entering into a construction contract exceeding the specified amount without holding the required permit.

The Shizuoka Prefecture revoked the construction license of J-Planning Corporation because its business office location could not be confirmed, and no application was received within 30 days of public notice.

The Saitō-gumi Corporation was instructed by Saitama Prefecture under the Construction Business Act, Article 28, Paragraph 1, Item 1, for damaging NTT's underground pipes and communication cables during excavation work on October 21-22, 2025, which caused communication disruptions in the surrounding area.

Kanto Construction Industry Co., Ltd. was suspended from business activities for 60 days starting May 12, 2026, due to a criminal conviction related to bid rigging and misconduct in public construction bidding, which violates Article 28, Paragraph 1, Item 2 of the Construction Business Act.

The Osaka Prefecture revoked the construction license of Mukaiichi Soken Co., Ltd. due to a criminal conviction of its director for a violation of the Penal Code, with the conviction finalized on January 12, 2022.