| April 15, 1920 |
Toyo Menka Kaisha, Ltd. (capital: ¥12.5 million, head office: Osaka) established; cotton business taken over from Mitsui & Co., Ltd. |
| 1947 |
Machinery, metals, and foodstuffs businesses started |
| 1949 |
Sanyo Oil & Fat Industrial Co., Ltd. (currently Sanyo Chemical Industries, Ltd.) established through joint investment with Toyo Rayon Co., Ltd. (currently Toray Industries, Inc.) |
| 1950 |
Listed on the Osaka and Tokyo stock exchanges |
| 1951 |
Toyomenka, Inc. (currently Tomen America Inc.) established |
| 1955 |
Merger with Kanegafuchi Trading Co., Ltd.; textile business expanded |
| 1955 |
Listed on the Nagoya stock exchange |
| 1961 |
Merger with Taiyo Bussan Kaisha Ltd.; foodstuffs business expanded |
| 1963 |
Merger with Nankai Kogyo Co., Ltd.; metals business expanded |
| 1965 |
Sunpot Co., Ltd. Established |
| 1968 |
Grain silo business launched; operation of grain-processing complex in Higashinada started |
| 1970 |
Japanese name changed to Kabushiki Kaisha Tomen; dual head office system (Tokyo, Osaka) adopted |
| 1980 |
Tohoku Grain Terminal Co., Ltd. Established |
| 1983 |
Teijin Advanced Products Corporation (currently Tomen Electronics Corporation) acquired |
| 1987 |
Power supply business launched; wind power generation project started in the U.S.A. |
| 1988 |
Tomen Power Corporation Established |
| 1989 |
London branch closed and Toyomenka (U.K.) Ltd. Established |
| 1990 |
Spin-off of cotton business; Toyo Cotton (Japan) Co. established |
| 1990 |
Operational rights in Japan acquired from Chevron Chemical, including trademark and exclusive development and distribution rights for agrochemical product "ORTRAN" |
| 1990 |
P.T. Styrindo Mono Indonesia established |
| 1990 |
English name changed to Tomen Corporation |
| 1992 |
Tomen Devices Corporation established |
| 1999 |
Tomen Electronics Corporation listed on the Second Section of the Tokyo Stock Exchange |
| 2000 |
Capital and business alliance initiated with Toyota Tsusho Corporation (private placement of shares worth ¥7.5 billion) |
| 2001 |
Stock listing of Tomen Electronics Corporation upgraded to the First Section of the Tokyo Stock Exchange |
| 2001 |
Life science business integrated with Arysta LifeScience Corporation |
| 2001 |
Spin-off of part of power supply business into Tomen Power Holdings Corporation (currently Eurus Energy Holdings Corporation) conducted |
| 2003 |
Sunpot Co., Ltd. listed on the Second Section of the Tokyo Stock Exchange |
| 2003 |
Private placement of shares worth ¥10 billion to Toyota Tsusho Corporation and Toyota Motor Corporation undertaken |
| 2004 |
Tomen Devices Corporation listed on the Second Section of the Tokyo Stock Exchange |
| 2005 |
Stock listing of Tomen Devices Corporation upgraded to the First Section of the Tokyo Stock Exchange |
| 2006 |
Merger with Toyota Tsusho Corporation |
