建築士法 Enforcement Actions in Japan

The individual, Ryuuji Takenaga, was issued a formal warning on January 21, 2026, for failing to complete the first-class architect refresher course as required by Article 22-2 of the Building Standards Act, despite being affiliated with an architectural office as of October 31, 2023.

Kubo Yama Hiroyuki was issued a formal warning (caution) on January 19, 2026, for violating the Building Architect Law by failing to attend the mandatory periodic training as required by Article 22-2 of the law, despite being affiliated with an architectural office as of September 30, 2025.

In January 2026, Eiji Suzuki received a formal warning (caution) from the authorities for failing to complete the mandatory first-class architect refresher course, despite prior written notice, as of September 30, 2024.

In September 2024, Kodama Jin was issued a formal warning for failing to complete the mandatory first-class architect refresher course, despite prior written notice, as required by the Building Architect Act.

A notice of reprimand was issued to Mr. Jun Suzuki for failing to attend the mandatory first-class architect refresher course without valid reason, despite being affiliated with an architectural office and having previously received a written warning for this violation.

A notice of reprimand was issued to Mr. Noriyasu Ban for failing to attend the mandatory first-class architect refresher course, despite being affiliated with an architectural office and having previously received a written warning for this violation.

In January 2026, Matsumori Masaharu received a formal warning (counseling) from the authorities for failing to attend the mandatory first-class architect refresher course, despite being affiliated with an architectural office and having been previously notified in writing.

On January 6, 2026, Watanabe Tetsu received a formal warning from the authorities for violating the Building Standards Act in relation to a design for a building in Aichi Prefecture. The violation involved non-compliance with specific building code requirements concerning fire-resistant construction standards for a wooden roof structure exceeding 300 square meters.

On January 6, 2026, Keichi Yazawa received a formal warning (kekoku) from the authorities for designing a building in Mie Prefecture that failed to include required automatic fire alarm systems, in violation of the Building Standards Act and Fire Service Law provisions applicable to fire prevention for buildings over 500 m².

The Tokyo Metropolitan Government has ordered a 14-day suspension of business activities for Takamatsu Construction Co., Ltd. Tokyo Head Office First-Class Architect Office (Registration No. 54842) from June 1, 2026, due to the creation and submission of false confirmation certificates related to building projects in Tokyo.

On December 15, 2025, the authorities ordered a suspension of business activities for Masashi Horiguchi due to violations related to the construction and certification processes of two buildings in Saitama Prefecture. The violations included creating false certification documents, allowing unverified construction work, and failing to report as required by law.

The individual Nagai Yoshihisa was ordered to cease building-related operations from June 1, 2026, for two months, due to violations involving the creation of false certificates and permitting unapproved construction work in Aichi Prefecture.

The company, 株式会社アイ・エ－・シ－一級建築士事務所, was issued a one-month suspension of business starting March 1, 2026, due to violations of the Building Standards Act related to design standards for residential buildings in Kanagawa Prefecture.

In August 2025, Okada Mitsuteru's architectural design office was ordered to cease operations for 14 days due to violations of building safety standards in Osaka Prefecture.

On March 19, 2025, Mr. Tsunetaka Murato (Registration No. 119599) received a formal warning from the authorities for failing to complete the mandatory first-class architect refresher course as required by the Building Architect Law, despite prior written notice.

In March 2025, Mr. Shoji Fukusaki received a formal warning from the authorities for failing to attend the mandatory first-class architect refresher course, despite prior written notice, as of September 30, 2024.

On March 19, 2025, Kenjiro Nakazawa received a formal warning (counseling) from the authorities for failing to complete the mandatory first-class architect refresher course under Article 22-2, Paragraph 1 of the Building Architect Law, despite being affiliated with an architectural office and having been previously notified in writing.

On March 19, 2025, Hideki Hara received a formal warning (kikoku) from the authorities for failing to attend the mandatory first-class architect refresher course, despite being affiliated with an architectural office and having been previously notified in writing.

In 2025, Mori Shigeki received a formal warning for failing to complete the mandatory first-class architect refresher course as required by the Building Architect Law, despite prior written notice.

On March 19, 2025, a formal notice was issued to Mr. Sumii Noraki (registration number 172276) for failing to attend the mandatory first-class architect refresher course as required by the Building Architect Law, despite being affiliated with an architectural office and having been previously warned in writing.

Noboru Nonaka received a warning for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architectural office as of October 31, 2023.

Hirano Kazuhiro received a warning letter on January 12, 2024, for failing to complete the mandatory first-class architect refresher course between April 1, 2019, and October 31, 2023, in violation of Article 22-2 of the Building Architect Act. As of October 31, 2024, he was still affiliated with an architect's office without having completed the course, despite prior notice.

Ogasawara Kenji received a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

On February 5, 2025, Kurowami Shuichi received a formal warning for violating the Building Architect Law by failing to complete the mandatory first-class architect refresher course between April 1, 2019, and October 31, 2023, despite being affiliated with an architectural office as of October 31, 2024.

The individual, Nakatsuka Takehito, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

Miki Sato received a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

Yoshida Hiro was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

The individual, Yoshifumi Shiobara, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

Sato Masaaki received a warning for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

A notice of reprimand was issued to Sayuko Miino (Oohara) for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architectural office as of October 31, 2023.

The individual, Noboru Suoe, was issued a warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

Takada Sejirō received a warning for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architect's office as of October 31, 2023.

Fukushima Jun received a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

A notice of reprimand was issued to Terashima Yasuo for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architectural office as of October 31, 2023.

The individual, Sugaya Masayuki, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architect's office as of October 31, 2023.

The individual, Toyomi Fukazawa, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

Mitsumoto Mitsuo received a formal warning (reprimand) on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

The individual, Iida Sachie, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

A formal warning was issued to Kazuichi Tsukamoto for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architectural office as of October 31, 2023. The violation occurred between April 1, 2019, and October 31, 2023.

A formal warning was issued to Mr. Toshimi Furusawa for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architectural office as of October 31, 2023.

Ebara Ryuuo received a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Standards Act, despite being affiliated with an architect's office as of October 31, 2023.

Watanabe Fumio received a formal warning for failing to attend the periodic training required under Article 22-2 of the Building Standards Act between April 1, 2019, and October 31, 2023, despite prior written notice.

The individual, 西本 好男, was issued a warning on January 12, 2025, for failing to complete the mandatory structural design first-class architect refresher course as required by Article 22-2 of the Building Standards Act, despite being notified in writing. As of October 31, 2023, he continued to violate this requirement without valid reason.

Obata Teruo received a warning letter on January 12, 2024, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

The individual, Tsujigaki Yoshiko, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect's office as of October 31, 2023.

In violation of Article 22-2, Paragraph 4 of the Building Standards Act, the individual failed to attend the required regular training for first-class structural engineers from April 1, 2019, to October 31, 2023, despite being warned in January 2024. As of October 31, 2024, they continued to violate this requirement without valid reason.

Takahashi Zen received a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Law, despite being affiliated with an architectural office as of October 31, 2023.

The individual, Shoei Kenmochi, was issued a formal warning on February 5, 2025, for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architectural office as of October 31, 2023.

A formal warning was issued to Takano Naotoshi for failing to complete the mandatory first-class architect refresher course as required by Article 22-2 of the Building Architect Act, despite being affiliated with an architect office as of October 31, 2023.

On January 14, 2025, a formal warning (戒告) was issued to Masakazu Miyaji for allowing construction work on a building in Osaka Prefecture without obtaining the confirmation certificate required under the Building Standards Act, related to the operations of the first-class architect office M Architects (registered in Hyogo Prefecture).

In September 2024, Nishida Noriyuki was issued a formal warning (counseling) for violating the Building Architect Act by failing to complete the mandatory periodic training required under Article 22-2, despite being affiliated with an architectural office as of September 30, 2024.

In January 2025, a formal warning was issued to Mr. Hara Eihiro for failing to attend the periodic training required under Article 22-2 of the Building Standards Act between April 2019 and October 2023, despite prior written notice.

In January 2025, Uiya Suzuki received a formal warning (counseling) from the authorities for failing to complete the mandatory periodic training under Article 22-2 of the Building Standards Act between April 2019 and October 2023, despite being notified in writing.

In January 2025, Watanabe Toshinori received a formal warning (kikoku) for failing to complete the periodic training required under Article 22-2 of the Building Architect Act between April 1, 2019, and October 31, 2023, despite prior written notice.

In relation to the violation of the Building Architect Act, Takayuki Otsuka was issued a formal warning on January 10, 2025, for failing to attend the mandatory periodic training under Article 22-2 of the Act between April 1, 2019, and October 31, 2023, despite being affiliated with an architectural office and having received prior written notice.

In January 2025, Koichi Munakata received a formal warning (counseling) from Japanese authorities for failing to complete mandatory periodic training under Article 22-2 of the Building Standards Act between April 2019 and October 2023, despite prior written notice.

Koichiro Nishi received a warning for failing to attend the mandatory refresher course under the Building Architect Act, despite being affiliated with an architectural office as of September 30, 2024.

Sakamoto Kozo received a formal warning (caution) on January 10, 2025, for failing to complete the mandatory periodic training under Article 22-2 of the Building Architect Law, despite being affiliated with an architectural office as of September 30, 2024.

Kinoshita Yoshinori received a formal warning (caution) from the authorities for failing to attend the mandatory training under Article 22-2 of the Building Standards Act, despite being notified in writing, and still being affiliated with an architectural office as of September 30, 2024. The violation was confirmed on January 10, 2025.

In September 2024, Hideo Toriya was issued a formal warning (counseling) for violating the Building Architect Law by failing to attend the required periodic training despite being affiliated with an architectural office as of September 30, 2024.

In January 2025, Sakakibara Akio received a formal warning from Japanese authorities for failing to complete mandatory continuing education under the Building Architect Law between April 2019 and October 2023, despite prior written notice.

In January 2025, Rumi Sugiyama received a formal warning (戒告) from the authorities for failing to attend the mandatory periodic training under Article 22-2 of the Building Architect Law, despite prior written notice.

In January 2025, Kan Masayuki received a formal warning (kekoku) from Japanese authorities for failing to complete mandatory periodic training under Article 22-2 of the Building Architect Law between April 2019 and October 2023, despite prior written notice.

In 2025, Mr. Minoru Hiragaki received a formal warning (counseling) from the authorities for failing to complete the mandatory continuing education under Article 22-2 of the Building Standards Act between April 1, 2019, and October 31, 2023, despite prior written notice.

In January 2025, Kobayashi Akihiro received a formal warning (counseling) from Japanese authorities for failing to complete the mandatory periodic training under Article 22-2 of the Building Architect Law, despite prior written notice.

In January 2025, 奥村 尚史 received a formal warning (戒告) from authorities for failing to complete the mandatory periodic training under Article 22-2 of the Building Architect Act between April 2019 and October 2023, despite being notified in writing.

In 2025, Yuza Kazuwo received a formal warning (kikoku) for failing to attend the periodic training required under Article 22-2 of the Building Architect Act, despite being notified in writing and having no valid reason for non-compliance.

Shibata Ryu received a formal warning for failing to attend the required periodic training under the Building Architect Act between April 1, 2019, and October 31, 2023, despite being notified on January 12, 2024.

Kenta Yamatani was issued a formal warning (caution) on January 7, 2025, for failing to complete the mandatory periodic training under Article 22-2 of the Building Standards Act between April 1, 2019, and October 31, 2023, despite being notified in January 2024.

Kobuta Katsumi received a warning letter on January 12, 2024, for failing to attend the mandatory first-class architect equipment design refresher course as required by Article 22-2 of the Building Standards Act, despite being notified of the violation on January 12, 2024.

On December 18, 2024, a formal warning was issued to Yoshihito Tsuchiya for violations related to building design regulations in Yamanashi Prefecture, involving failure to comply with fire safety and ventilation requirements in a building designed by Tsuchiya Design Office.

Yuichi Kojima was suspended from practice for one month starting June 1, 2025, due to creating and distributing false building confirmation certificates related to a Tokyo building project, knowing they were not issued by the authorized architect.

Hanyu Yoshimasa was ordered to cease operations from June 1, 2025, for three months due to violations related to building inspections and false application submissions concerning a building in Osaka Prefecture.

A formal warning (戒告) was issued to Kenichi Takai regarding a design violation related to a small freight elevator in Hokkaido, involving non-compliance with standards for elevator doors and enclosures as specified in the Building Standards Act Enforcement Order and related ministerial notices.

In October 2023, Yoshitaka Atsukawa, a first-class structural design architect, was issued a formal warning for failing to complete the required periodic training between April 2018 and October 2022, despite being previously notified in February 2023. The warning was issued on January 12, 2024.

In January 2024, Mr. Masashi Tomisho received a formal warning from the authorities for failing to attend periodic training as required by the Building Architect Law, despite prior notice.

In January 2024, Ishida Taketo received a formal warning from the authorities for failing to complete required periodic training as a first-class building design engineer, despite prior notice.

In January 2024, Junichi Hirokawa was formally reprimanded for failing to complete required periodic training as a first-class building design engineer, despite prior written notice.

In October 2023, Ogawa Masaki was formally reprimanded for failing to complete required periodic training as a first-class building design engineer, despite prior written notice in February 2023.

In October 2023, Junichi Kondo was issued a formal warning for failing to complete required periodic training as a first-class building design engineer, despite prior notice.

In January 2024, Sasaki Yukio received a formal warning from the authorities for failing to complete periodic training as a first-class structural design architect, despite prior notice.

In January 2024, Ogawa Sadami received a formal warning from the authorities for failing to complete required periodic training as a registered first-class building designer, despite prior notice.

In January 2024, Kaoru Hirotsu received a formal warning from the authorities for failing to complete required periodic training as a first-class building facilities designer, despite prior notice.

In January 2024, Kimura Haruki received a formal warning from the authorities for failing to complete required periodic training as a first-class building design engineer, despite prior notice.

In January 2024, Shigeta Mamoru was formally reprimanded for failing to complete required periodic training as a first-class building design engineer, despite prior written notice.

In January 2024, Mr. Yoshihiro Okamura was issued a formal warning by the relevant authority for failing to complete required periodic training as a first-class building design engineer, despite prior notice.

In January 2024, Mr. Takeji Nishio received a formal warning from the authorities for failing to attend periodic training sessions required for architects, despite prior written notice.

In January 2024, Kaneko Minoru received a formal warning from the authorities for failing to complete required periodic training as a first-class structural design architect, despite prior notice.

On January 12, 2024, Koizumi Sorashi received a formal warning (counseling) from the authorities for failing to attend the mandatory first-class architect refresher course under the Building Architect Law, despite prior written notice.

In 2024, Shuu Tezuka received a warning for failing to attend periodic training as a first-class structural design architect, despite prior written notice.

In January 2024, Mr. Hiroshi Fujimura was issued a formal warning by the authorities for failing to attend periodic training as required for a first-class structural design architect, despite prior notice.

In October 2023, Hirota Katsumi, a first-class building engineer, was issued a formal warning for failing to attend required periodic training between April 2015 and November 2022, despite prior written notice.

In January 2024, Mr. Hidetada Yoshiwara was issued a formal warning for failing to attend periodic training as required by the Building Architect Law, despite prior written notice.

In January 2024, Yu Yamagata received a formal warning (counseling) from Japanese authorities for failing to attend periodic training required for architects, despite prior notice.

In January 2024, Shinnichiro Horikawa received a warning letter from the authorities for failing to attend periodic training as a first-class structural design architect, despite prior notice.

In January 2024, Mr. Noritoshi Morita was issued a formal warning for failing to complete periodic training as required by the Building Architect Law, despite prior notice.

In January 2024, Hibino Toshio received a formal warning from Japanese authorities for failing to complete required periodic training as a first-class structural design architect, despite prior written notice.

The individual, Shigeru Ohno, a first-class architect specializing in equipment design, was issued a formal warning on January 12, 2024, for failing to attend periodic training between April 1, 2013, and October 31, 2017, despite prior notice.

In January 2024, Hoshino Jin received a formal warning from the authorities for failing to attend periodic training as required by the Building Architect Law, despite being notified in February 2023.

In January 2024, 岡田 岩雄 received a formal warning (戒告) from the authorities for failing to attend required periodic training as a first-class structural design architect, despite prior written notice.