| August, 1947 |
Established Tokyo Denki Komusho Co.,Ltd at Niibori-cho, Minato-ku, Tokyo with capital of \180,000-.
(Minato-ku, Shinbori cho） |
|---|---|
| July, 1960 |
Head office moved a new building at Higashiazabu Minato-ku, Tokyo.
(Minato-ku, Higashi-Azabu) |
| November, 1961 | Stocks listed in the Second Section of the Tokyo Stock Exchange. | August, 1974 | Established four Construction Departments at Keihin, Boso, Kashima and Fukushima. |
| June, 1979 | Keihin Sales Office (formerly Keihin Construction Dept. Office) moved to Kawasaki-shi, Kanagawa. |
| December, 1979 | Chiba Sales Office (formerly Boso Construction Dept. Office) moved to Ichihara-shi, Chiba. |
| August, 1980 |
Head office moved a new building at Shinbashi Minato-ku, Tokyo.
(Minato-ku Shinbashi） |
| February, 1981 | Ibaraki Sales Office (formerly Ibaraki Construction Dept. Office) moved to Kashima-gun, Ibaraki. |
| March, 1981 | Fukushima General Branch (formerly Fukushima Construction Dept. Office) moved to Tomioka-machi Futaba-gun, Fukushima. |
| October, 1981 | Stocks listed in the First Section of the Tokyo Stock Exchange. |
| August, 1982 | Established Niigata Branch at Kariwa-gun, Niigata. |
| March, 1994 | Capital increased to 2,881 million yen. |
| July, 1995 | Niigata Branch moved to Kashiwazaki-shi, Niigata. |
| July, 1998 | Established Aomori Branch (formerly Nuclear Power Dept. Rokkasho Office) at Kamikita-gun, Aomori. |
| April, 2001 | Company name changed to TOKYO ENERGY & SYSTEMS INC. |
| January, 2007 | Enacted Implementing Charter of Corporate Code of TOKYO ENERGY & SYSTEMS INC. Group. |
| January, 2007 | Established Welding and Inspection Engineering Center (formerly the Total Engineering Center) at Chiba-shi, Chiba. |
| August, 2012 | Keihin Sales Office moved to Yokohama-shi, Kanagawa. |
|---|---|
| August, 2013 |
Head office moved a new building at Nihonbashi Kayabacho Chuo-ku,Tokyo.
(Chuo-ku, Nihonbashi Kayabacho) |
| September, 2013 | Ibaraki Sales Office moved to Hitachinaka-shi, Ibaraki. |
| March, 2015 |
Installation of the TOME solar park (solar power plant) in Tome-shi of Miyagi.
(Tome city of Miyagi) |
| April, 2015 | Installation of the HATOYAMA solar park (solar power plant) in Hie-gun of Saitama. |
| September, 2016 | Fukushima General Branch moved to Okuma-machi Futaba-gun,Fukushima. |
| July, 2021 | Took over a part of Hitachi Plant Construction, Ltd.’s thermal power generation business after a corporate split-up. |
| April, 2022 | Migrated from the First Section of the Tokyo Stock Exchange to its “Prime Market” after a revision of the exchange’s market segment classification. |
| October, 2022 | SAKAIMINATO ENERGY POWER LLC commences commercial operation of Sakaiminato Biomass Power Plant. |
