| 1997-05 |
Established in Ichibancho, Chiyoda-ku, Tokyo, as Japan's first company dedicated solely to ESCO business |
| 1997-05 |
Date of establishment |
| 2003-09 |
Relocated headquarters to 2-9-2 Kyobashi, Chuo-ku, Tokyo |
| 2004-02 |
Established a subsidiary related to green energy business, Hitachi Wood Power Co., Ltd. |
| 2004-02 |
Established a subsidiary related to green energy business, Shirakawa Wood Power Co., Ltd. |
| 2005-03 |
Listed on the Tokyo Stock Exchange Mothers (Securities Code 9514) |
| 2008-01 |
Established BioNensa Service Co., Ltd. to collect fuel for power generation in green energy business |
| 2008-06 |
Relocated headquarters to 2-10-2 Kyobashi, Chuo-ku, Tokyo |
| 2010-04 |
Changed the trade name from BioNensa Service Co., Ltd. to First Bios Co., Ltd. |
| 2011-01 |
Relocated Kansai branch to 22 Itayacho, Wakayama City, Wakayama Prefecture |
| 2011-05 |
Relocated headquarters to 7-12 Yaesu 2-chome, Chuo-ku, Tokyo |
| 2011-06 |
Transferred 50% of shares of Shirakawa Wood Power Co., Ltd. to Japan Techno Co., Ltd. |
| 2012-06 |
Established RE Fukushima Co., Ltd. as a subsidiary related to green energy business |
| 2012-07 |
Established Soleil Hitachi Co., Ltd. as a subsidiary related to green energy business |
| 2012-08 |
Established RE Oita Co., Ltd. as a subsidiary related to green energy business |
| 2013-07 |
Acquired 50% of shares of Shirakawa Wood Power Co., Ltd. from Japan Techno Co., Ltd., and made it a consolidated subsidiary |
| 2014-10 |
Changed the trade name from RE Fukushima Co., Ltd. to RE Kanuma Co., Ltd. |
| 2015-11 |
Changed listing to the Second Section of the Tokyo Stock Exchange (Securities Code 9514) |
| 2016-02 |
Changed listing market to the First Section of the Tokyo Stock Exchange (Securities Code 9514) |
| 2016-04 |
The company First Bios Co., Ltd. changed its trade name to E-F Bios Co., Ltd. |
| 2016-04 |
The company Shirakawa Wood Power Co., Ltd. changed its trade name to E-F On Shirakawa |
| 2016-04 |
The company Hita Wood Power Co., Ltd. changed its trade name to E-F On Hita |
| 2016-04 |
RE Oita Co., Ltd. changed its trade name to E-F On Bungo Ono |
| 2016-07 |
RE Kanuma Co., Ltd. changed its trade name to E-F On Mibu |
| 2016-10 |
First S Co., Ltd. changed its trade name to E-F On |
| 2017-04 |
Relocated headquarters to 3-1-1 Kyobashi, Chuo-ku, Tokyo |
| 2021-12 |
Relocated headquarters to 1-9-2 Marunouchi, Chiyoda-ku, Tokyo |
