History

Established under its current trade name at 1-18-1 Toranomon, Minato-ku, Tokyo, commenced contract work for building-related equipment

To establish itself as a comprehensive building equipment contractor specializing in the installation of air conditioning, sanitation, and electrical equipment, takes over Tokyo Setsubi Co., Ltd. and Taikei Koji Co., Ltd.. Also opens branches in Osaka and Nagoya (renamed Kansai Branch and Tokai Branch, respectively, in September 2016), sales offices in Sendai, Hiroshima, and Fukuoka, and a sub-branch in Kumamoto (upgraded to sales office in March 1971). Following the takeover, succeeds to shares Taikei Koji Co., Ltd. held in Hibiya Tsushou Co., Ltd. (established in Minato-ku, Tokyo, June 1961).

Sendai Sales Office upgraded to branch (renamed Tohoku Branch in July 1988)

Opening of Matsuyama Sub-Branch (upgraded to sales office in March 1971, renamed Shikoku Sales Office in July 2000, and upgraded to branch in April 2003)

Opening of Sapporo Sales Office (upgraded to branch in March 1971, renamed Hokkaido Branch in September 2016)

Opening of Kanazawa Branch (upgraded to sales office in March 1971, renamed Hokuriku Sales Office in February 1994, upgraded to branch in April 2003)

Opening of Yokohama Sub-Branch (upgraded to sales office in March 1971, to branch in August 1993)

Hiroshima and Fukuoka sales offices upgraded to branches (Fukuoka Branch renamed the Kyushu Branch in July 1988, Hiroshima Branch renamed the Chugoku Branch in September 2016)

Obtains Minister of Construction permit [Toku/Han-49] No. 3931). (Permit to be renewed every three years thereafter.)

Opening of Okinawa Sub-Branch (upgraded to sales office in June 1981, to branch in July 2018)

New gas turbine assembly plant constructed in Noda City, Chiba Prefecture. (Plant closed in April 1987)

Company listed on Second Section of Tokyo Stock Exchange

Head Office moves to 5-37-8 Shiba, Minato-ku, Tokyo.

Opening of Singapore Sales Office (closed in July 1988).

Former gas turbine assembly plant in Noda, Chiba Prefecture, is remodeled and opens as technical research facility.

To maintain and develop a mutually complementary relationship for business purposes centered on construction for building equipment, the submitting company equity stake in Hibiya Tsushou Co., Ltd. was increased to 55.7%, making it a consolidated subsidiary. (In March 2003, additional shares were acquired, bringing the voting rights ratio to 69.0%. In July 2012, the voting rights ratio increased to 73.7% due to a share buyback by Hibiya Tsushou Co., Ltd. In September 2017, the voting rights ratio increased to 77.6% due to a share buyback by Hibiya Tsushou Co., Ltd. In February 2023, the voting rights ratio increased to 85.0% due to a share buyback by Hibiya Tsushou Co., Ltd.)

Receives (renewed) permit No. 3931 (Toku/Han - 7) from Minister of Construction. (Permit to be  renewed every five years thereafter)

Company listed on First Section of Tokyo Stock Exchange.

Corporate Business Division separated from Head Office organization, Tokyo Main Office established

To improve the Group’s overall strength, acquires additional Nikkey Co., Ltd. shares, bringing the Company’s voting rights ratio to 48.1% and making Nikkey a consolidated subsidiary by applying control criteria. (In September 2017, and again in February 2018, increased our voting rights ratio in Nikkey Co., Ltd. to 100% by share buybacks)

Head Office moves to 4-2-8 Shibaura, Minato-ku, Tokyo.

To expand the Group’s business areas into the fields of pharmaceuticals and food, further strengthen its planning and design operations, and work to enter environmental fields such as wastewater treatment, of which much is expected in the future, the Company acquires all shares of HIT Engineering Co., Ltd., making it a wholly owned subsidiary. (Taken over in January 2021)

Receives permit (renewal) for Minister of Land, Infrastructure, Transport and Tourism permit (Toku-27) No. 3931. (Permit to be renewed every five years thereafter)

Head Office moves to its current location.

Due to a Tokyo Stock Exchange market segmentation review, the Company transitions from the First Section to the Prime Market.