| Company name | Group | Parent | Subsidiary | Customer | Supplier | Alliance | Bank | Shareholder |
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| 株式会社ダイエー | ||||||||
| ハノイシティ本社 | ||||||||
| ベトナム ICHIKEN Vietnam Construction | ||||||||
| 学校法人中内学園流通科学大学 | ||||||||
| 竜野開発株式会社 | ||||||||
| 第一建築株式会社 | ||||||||
| 第一建設株式会社 | ||||||||
| 第一相互住宅株式会社 | ||||||||
| LICOPA 東大和 | ||||||||
| LOGIPORTAL大正 | ||||||||
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| アパホテル〈赤羽岩淵駅前〉 | ||||||||
| イオンスタイル八戸沼館 | ||||||||
| オーケー高井田店 | ||||||||
| コープかすかべテラス | ||||||||
| 株式会社エコリング 本社 | ||||||||
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Founded Daiichi Mutual Housing Co., Ltd. in 1930.
Daiichi Mutual Housing Co., Ltd. was established.
Founded in 1930
Renamed to Daiichi Construction Co., Ltd. in 1943.
Renamed to Daiichi Construction Co., Ltd.
Renamed to Daiichi Construction Co., Ltd. in 1946.
Renamed to Daiichi Construction Co., Ltd.
Renamed to Daiichi Construction Industry Co., Ltd. in 1956.
Renamed to Daiichi Construction Industrial Co., Ltd.
Opened a Tokyo branch in 1963 and listed shares on the Tokyo and Osaka Stock Exchanges, Second Section.
Tokyo Branch was opened.
The company's shares were listed on the Tokyo and Osaka Stock Exchanges, Second Section.
Opened Daiei Chifune store, Akatonbo Plaza Shopping Center, and New Kobe Oriental Hotel/OPA in 1970.
Entered into a business partnership with Daiei Co., Ltd. in 1979.
Partnered with Daiei Co., Ltd.
Opened Fukuoka office (now Kyushu branch) in 1982.
Opened the Fukuoka branch (now Kyushu branch).
Merged with Ryuno Development Co., Ltd. in 1985 and established Ryuno Development Office (formerly Akatonbo Plaza Shopping Center).
Merged with Ryuno Development Co., Ltd. and established the Ryuno Development Office (formerly Akatombo Plaza Shopping Center).
Opened Okinawa office in 1986.
Opened the Okinawa branch.
Opened Sapporo office (now Sapporo branch) in 1988.
Opened the Sapporo branch (now Sapporo branch).
Moved the headquarters office to Chuo-ku, Kobe.
Changed company name to Ichiken Co., Ltd. in 1989 and moved headquarters to Chuo-ku, Kobe.
Changed the company name to ICHIKEN Co., Ltd.
Moved the head office to Chuo-ku, Kobe.
Opened the Osaka branch (now Kansai branch).
Listed shares on the Tokyo and Osaka Stock Exchanges, First Section, in 1990.
Listed our shares on the First Section of the Tokyo and Osaka Stock Exchanges.
Opened Sendai office and Nagoya office (now Nagoya branch) in 1994.
Opened the Sendai branch and Nagoya branch (now Nagoya branch).
In 1996, the headquarters office was relocated to Minato Ward, Tokyo (Hamamatsucho).
Moved the headquarters office to Minato-ku, Tokyo (Hamamatsu-cho).
In 2000, the school corporation Nakane Gakuen Logistics Science University, Wao City Misato, and QizMALL Ryugasaki were established.
In 2004, a capital partnership was formed with Maruhan Co., Ltd.
Entered a capital partnership with Maruhan Co., Ltd.
In 2008, the head office location was changed from Chuo-ku, Kobe to Taito Ward, Tokyo, and the listing on the Osaka Stock Exchange was discontinued.
Changed the head office location from Chuo-ku, Kobe to Taito-ku, Tokyo.
Delisted from the Osaka Stock Exchange.
In 2010, Itearas Ochiai Minanagasaki, BMW Group Tokyo Bay, and Hainan City New City Hall were opened.
In 2015, the headquarters office was relocated to Minato Ward, Tokyo, and the head office location was changed to Minato Ward, Tokyo (Hamamatsucho).
Moved the headquarters office to Minato-ku, Tokyo and changed the head office location to Minato-ku, Tokyo (Hamamatsu-cho).
In 2017, the Hiroshima branch office was opened.
Opened the Hiroshima branch.
In 2018, the Hanoi office (Vietnam) was opened.
Opened the Hanoi office (Vietnam).
In 2022, the subsidiary ICHIKEN Vietnam Construction Co., Ltd. was established in Vietnam, and in 2023 the Ho Chi Minh City branch office was opened.
In 2022, due to a review of market classifications at the Tokyo Stock Exchange, the company moved from the First Section of the Tokyo Stock Exchange to the Prime Market.
Established a subsidiary in Vietnam, ICHIKEN Vietnam Construction Co., Ltd. (now Hanoi City headquarters).
Moved from the First Section to the Prime Market of the Tokyo Stock Exchange due to a review of market classifications.
In 2023, the company selected the Standard Market of the Tokyo Stock Exchange.
Selected the Standard Market of the Tokyo Stock Exchange
In 2024, Kataoka Industrial Co., Ltd. was made a subsidiary.
Converted Katagaki Industrial Co., Ltd. into a subsidiary
In 2025, the headquarters office was relocated to Minato Ward, Tokyo (Shinagawa), and the Ho Chi Minh City branch office of the subsidiary ICHIKEN Vietnam Construction Co., Ltd. was opened.
Moved the head office to Shinagawa, Minato-ku, Tokyo (current Tokyo headquarters)
Established subsidiary 'ICHIKEN Vietnam Construction Co., Ltd.' / Ho Chi Minh City branch office
In 2026, the Tokyo branch office of the subsidiary Kataoka Industrial Co., Ltd. was opened.
Established subsidiary 'Katagaki Industrial Co., Ltd.' / Tokyo branch office
An interview article with Ichiken Co., Ltd.'s President, Hiroaki Masaki, was featured in the November 2026 issue of the investment specialist magazine 'Shareholder's Handbook'. Details can be found at the provided link. The full article requires a paid membership registration.
Ichiken Co., Ltd. donated 10 million yen from the company and 1 million yen from the cooperation association to Kumamoto Prefecture and Kumamoto City for the support and reconstruction of the victims of the Kumamoto earthquake in Reiwa 8 (2026). We sincerely express our condolences to those affected and pray for a swift recovery and reconstruction.
Ichiken Co., Ltd. has included initiatives related to environmentally friendly technology "ZEB" and waste separation at construction sites in the "Corporate Educational Material Library" as part of its SDGs awareness activities. The aim is to assist students and educators in their learning.
Ichiken Inc. will observe a summer holiday from August 8 to 16, 2026, and will respond to inquiries sequentially during the period.