HISTORY

November 1968	Established Tamagawa Electronics Co., Ltd. in Ota-ku, Tokyo with a capital of 1 million yen.
May 1970	Changed from a limited company to a corporation. Moved the headquarters and factory to Minami-ku, Yokohama, Kanagawa Prefecture.
April 1977	Constructed and relocated the headquarters and factory to Ayase-cho (currently Ayase City), Takatsu-gun, Kanagawa Prefecture.
March 1996	Obtained ISO9001 certification.
August 1999	Registered the company's shares with the Japan Securities Dealers Association.
February 2004	Obtained ISO14001 certification.
April 2007	Renewed the designation as a Kanagawa Small and Medium Enterprise Model Factory.
October 2007	Changed the company name to Tamagawa Holdings Co., Ltd. through a corporate split and established Tamagawa Electronics Co., Ltd.
November 2009	Established the "Environmental Business Preparation Office."
May 2010	Renamed the "Environmental Business Preparation Office" to "Environment and Energy Business Division."
October 2010	Established the "Solar Energy Business Preparation Office."
October 2011	Renamed the "Solar Energy Business Preparation Office" to "Solar Energy Business Division."
February 2012	Opened the "Solar Energy Business Division Fukuoka Sales Office" as a sales base in the Kyushu region.
September 2012	Established wholly-owned subsidiary GP Energy Co., Ltd.
January 2013	Implemented a third-party allocation of shares and established wholly-owned subsidiaries GP Energy 2 Co., Ltd. and GP Energy 3 Co., Ltd.
February 2013	Established wholly-owned subsidiary Tamagawa Solar Systems Co., Ltd. Opened the Tokyo office of Tamagawa Holdings Co., Ltd.
June 2013	Became a Qualified Institutional Investor. Commenced electricity sales at the Yamaguchi Prefecture Shimonoseki Mega Solar Power Plant.
July 2013	Established wholly-owned subsidiaries GP Energy 3-A Co., Ltd., GP Energy 5 Co., Ltd., and GP Energy 6 Co., Ltd.
March 2014	Implemented a 3-for-1 stock split.
December 2014	Started the geothermal power plant project. Changed the "Solar Energy Business" to "Renewable Energy Business."
February 2015	Commenced electricity sales at the Chiba Prefecture Tateyama Mega Solar
March 2015	Started electricity sales at the Sodegaura City Mega Solar Power Plant in Chiba Prefecture. Signed a memorandum of understanding regarding business alliance with Etrion Japan K.K.
May 2015	Changed the company name from "Tamagawa Solar Systems Co., Ltd." to "Tamagawa Energy Co., Ltd."
June 2015	Subsidiary Tamagawa Electronics established "TAMAGAWA ELECTRONICS VIETNAM CO., LTD." in Vietnam.
January 2016	Established the "Hydrogen Power Business Preparation Office." Installed a "Solar Tracking System" at the Chiba Prefecture Sodegaura Mega Solar Power Plant.
March 2016	Commenced electricity sales at the Chiba Prefecture Kamogawa City Small Wind Power Plant.
June 2016	Acquired investment interests in Etrion Energy 5 G.K. (became an equity method affiliate).
April 2017	Commenced electricity sales at the Ibaraki Prefecture Kasumigaura City Mega Solar Power Plant.
September 2017	Completed construction and commenced full-area electricity sales at the Aomori Prefecture Misawa City Mega Solar Power Plant.
April 2017	Commenced electricity sales at the Aomori Prefecture Shimokita-gun Oma Town Small Wind Power Plant.
March 2018	Commenced electricity sales at the Shizuoka Prefecture Shimada City Solar Sharing Power Plant and the Nagasaki Prefecture Goto City Mega Solar Power Plant.
April 2018	Commenced electricity sales at the Aomori Prefecture Shimokita-gun Oma Town Small Wind Power Plant.
November 2018	Commenced electricity sales at the Hokkaido Noboribetsu City Mega Solar Power Plant.
April 2022	Due to the Tokyo Stock Exchange's market classification revision, the transition from JASDAQ (Standard) to the Standard Market is taking place.