| 1934-05 |
Hideo Oishi established "Oishi Shigematsu Shoten" in Kyobashi, Tokyo |
| 1934-05-26 |
Founded on May 26, 1934 |
| 1934-05-26 |
Hideo Oishi established "Oishi Hideo Shoten" in Matsuya-cho, Kyobashi, Tokyo |
| 1936-10 |
Oishi Shigematsu Shoten moved to Hachobori, Kyobashi, Tokyo |
| 1948-07 |
Hideo Oishi established "Oishi Trading Co., Ltd." and became president |
| 1948-07-16 |
Established Oishi Trading Co., Ltd. on July 16, 1948, and became president |
| 1948-07-16 |
Hideo Oishi established "Oishi Trading Co., Ltd." and became president |
| 1960-04 |
The instrumentation department was newly established at the Tokyo branch, starting the instrumentation business |
| 1961-04 |
Signed a dealership agreement with the Air Conditioning Control Division of Sanmu Hanewell |
| 1966-04 |
Signed a dealer agreement with the Equipment Control Division of Sanmu Hanewell, expanding the automatic air conditioning control business |
| 1974-03 |
Increased capital to 105 million yen |
| 1974-03 |
Increased capital to 105 million yen |
| 1976-06 |
Established Doto Oishi Trading Co., Ltd. (now Doto Otec Co., Ltd.) in Obihiro City, Hokkaido |
| 1977-03 |
Established Kyushu Oishi Trading Co., Ltd. (now Kyushu Otec Co., Ltd.) in Hakata-ku, Fukuoka City |
| 1977-06 |
Relocated headquarters, Tokyo branch, and Tokyo distribution center to Koto-ku, Tokyo |
| 1980-10 |
Established System Instrumentation Co., Ltd. (now Otec Service Hokkaido Co., Ltd.) in Sapporo, Hokkaido |
| 1986-10 |
Relocated headquarters to Toyo, Koto-ku, Tokyo |
| 1989-04 |
Changed trade name to "Otec" |
| 1996-02 |
Increased capital to 210 million yen |
| 1996-02 |
Increased capital to 210 million yen |
| 1997-03 |
Increased capital to 450 million yen |
| 1997-03 |
Increased capital to 450 million yen |
| 2000-04 |
Registered shares with the Japan Securities Dealers Association, initial price was 400 yen |
| 2000-04 |
Increased capital to 599.4 million yen |
| 2000-04 |
Registered shares with the Japan Securities Dealers Association, initial price was 400 yen |
| 2000-04 |
Increased capital to 599.4 million yen |
| 2001-12 |
Obtained ISO 9001 international standard for quality management systems |
| 2001-12 |
Obtained ISO 9001 international standard for quality management systems |
| 2005-10 |
Acquired shares of Chutoku Co., Ltd. (now Otec Environment Co., Ltd.) and made it a subsidiary |
| 2012-01 |
Acquired additional shares of Kyushu Otec Co., Ltd. and made it a subsidiary |
| 2012-04 |
Established Otec Service North Kanto Co., Ltd. |
| 2013-02 |
Acquired shares of Sanyu Shokai Co., Ltd. and made it a subsidiary |
| 2015-04 |
Established Otec Service Tohoku Co., Ltd. |
| 2016-08 |
Acquired shares of Furuno Electric Co., Ltd. and made it a subsidiary |
| 2019-04 |
Opened the Innovation Plaza in Toyo, Koto-ku, Tokyo |
| 2019-12 |
Launched the nationwide sales site "O/tegaru" |
| 2021-03 |
Acquired shares of Intercentral Corporation and made it a subsidiary |
| 2022-04 |
Reclassified from the JASDAQ (Standard) market to the Standard market due to review of the Tokyo Stock Exchange market segments |
| 2026-04 |
Acquired shares of K.T.S. Limited and made it a subsidiary |
