Techno Hirowa Co., Ltd.

Kojun Yajiro graduated from the Faculty of Engineering at Tokyo Imperial University and entered the Toyokawa Naval Arsenal in Aichi Prefecture. In the final stages of the war, he became a technical officer (captain) and was engaged in manufacturing equipment, research and development, and precision measurement.

Our company was founded in 1949. With the motto "Air and Water Technology," we are a total environmental engineering company that provides precision HVAC in clean rooms, refrigeration and cooling systems, water treatment systems, and other environmental control equipment for buildings.

Founded the company.

Established as Rait Industrial Co., Ltd. in Atsuta Higashimachi, Mizuhō-ku, Nagoya

Kojun Yajiro founded the predecessor of our company, "Rite Industries Co., Ltd." in Nagoya City.

Changed trade name to Rihwa Thermal Engineering Co., Ltd.

Changed company name to Riyowa Temperature Control Industries Co., Ltd.

Registered as a construction contractor under the Construction Business Act (Minister of Construction (H) No. 3724) and began installing air-conditioning equipment

Registered as a construction contractor under the Construction Business Act (Construction Minister (H) No. 3724) and began installing air-conditioning equipment.

Commenced installation of heating and cooling equipment using heat pump technology

Commenced installation of heating and cooling equipment using a heat pump system.

Opened Tokyo branch office (now Tokyo headquarters)

Established the Tokyo branch office (now Tokyo Headquarters).

Commenced installation of industrial special air-conditioning equipment

Commenced installation of industrial special air conditioning equipment.

Opened Osaka branch office (now Osaka branch)

Established the Osaka branch office (now Osaka Branch).

Established consolidated subsidiaries Tokyo Dia Air Conditioning Co., Ltd. in Tokyo and Rihwa Air Conditioning Co., Ltd. in Nagoya

Established the consolidated subsidiary Tokyo Dia Air Conditioning Co., Ltd. in Tokyo and the consolidated subsidiary Rihwa Air Conditioning Co., Ltd. in Nagoya.

Opened Kyushu branch

Established the Kyushu Branch.

Moved headquarters to the same address as the Tokyo branch and opened Nagoya branch

Moved headquarters to the same address as the Tokyo Branch and established the Nagoya Branch.

Opened Sendai branch office (now Tohoku branch)

Established the Sendai branch office (now Tohoku Branch).

Obtained permission (special, general) No. 3101 from the Minister of Construction following amendments to the Construction Business Act

Obtained permission No. 3101 from the Minister of Construction (special/general) following the amendment of the Construction Business Act.

Opened Chiba branch office (promoted to Chiba branch in May 1991)

Established the Chiba branch office (promoted to Chiba Branch in May 1991).

Opened Yokohama Sales Office (now Yokohama Branch)

Established the Yokohama branch office (now Yokohama Branch).

Established Okayama Sales Office (→ now China Branch)

Established the Okayama branch office (now Chugoku Branch).

Opened East Kanto Sales Office (promoted to Ibaraki Branch in April 1998)

Established the East Kanto branch office (promoted to Ibaraki Branch in April 1998).

Established Technology Development Center within headquarters (promoted to Research Institute in September 1986)

Established a Technology Development Center within the headquarters (promoted to Research Institute in September 1986).

Established Technology Development Research Institute in Setagaya, Tokyo (reorganized from Technology Development Center)

Established a new Technology Development Research Institute in Setagaya, Tokyo, and reorganized the Technology Development Center.

Changed company name to Techno RYOWA Co., Ltd.

Changed the company name to Techno Rihwa Co., Ltd.

Opened Saitama Sales Office (now North Kanto Branch)

Established the Saitama branch office (now North Kanto Branch).

Registered shares with the Japan Securities Association

Registered shares with the Japan Securities Dealers Association.

Listed on the Tokyo Stock Exchange Standard Market.

Listed shares on the Second Section of the Tokyo Stock Exchange

Listed shares on the Second Section of the Tokyo Stock Exchange.

Acquired Matsuura Electric System Co., Ltd. and made it a consolidated subsidiary

Acquired Matsura Electric System Co., Ltd. and made it a consolidated subsidiary.

Established Overseas Business Division

Established the Overseas Business Division.

Established local corporation PT.TECHNO RYOWA ENGINEERING in Indonesia

Established the local corporation PT. TECHNO RYOWA ENGINEERING in Indonesia.

Transitioned to a company with an Audit Committee and introduced the Executive Officer system

Transitioned to a company with an Audit Committee and introduced the Executive Officer system.

Completed construction of Techno RYOWA R&D Center in Yokohama City

Completed the Techno Rihwa R&D Center in Yokohama City.

Opened East Kanto Branch (merged Ibaraki and Chiba branches)

Opened the East Kanto Branch (integrated Ibaraki and Chiba branches).

Relocated headquarters and Tokyo main office to Shiba, Minato-ku, Tokyo

Relocated headquarters and Tokyo main office to Shiba, Minato-ku, Tokyo.