| 1938 | Showa Aircraft Precision Works Ltd. was established to manufacture aircraft components. |
| 1946 | Showa Manufacturing Co., Ltd., initiated the production of automobile components. |
| 1953 | Showa Manufacturing Co., Ltd., initiated the production of shock absorbers. |
| 1960 | Nagoya Plant started production. |
| 1964 | Showa stocks listed on section 2 of the Tokyo Stock Exchange. |
| 1965 | Saitama Plant started production. |
| 1969 | Corporate Head Office moved to Chuo-ku, Tokyo from Ohji-ku, Tokyo. |
| 1974 | Asaba Plant started production. |
| 1975 | Capital participation with Kaifa Industry Co., Ltd. in Taiwan. |
| 1978 | P.T. Showa Indonesia Manufacturing Co., Ltd. (current consolidated subsidiary) was established in Indonesia. |
| 1979 | Showa American, Inc. was establsihed in the U.S.A. |
| 1981 | Showa Do Brasil Ltd., (current consolidated subsidiary) was established in Brazil. |
| 1985 | Showa stocks listed on section 1 of the Tokyo Stock Exchange. |
| 1986 | Munjual Showa Ltd., (a joint venture company), was established in India. |
| 1986 | Sunbury Component Industries, Ltd., (a joint venture company) was established in U.S.A. |
| 1990 | Showa Europe, S.A. (current consolidated subsidiary) was established in Spain. |
| 1990 | R&D Tochigi Center started its operation. |
| 1991 | Corporate Head Office moved to Saitama from Tokyo. |
| 1993 | Renamed as SHOWA CORPORATION after the merger with Seikigiken Kogyo. Co., Ltd. Started production of steering systems. A subsidiary company in the United States and the stocks of the Blanchester FCM. Inc., are acquired by this merger. |
| 1993 | Summit Showa Manufacturing Co., Ltd., (current consolidated subsidiary) was established in Thailand. |
| 1994 | American Showa, Inc.,current consolidated subsidiary, was established as a new company after Sunbury Component Industries Inc. merged with Blanchester FCM., Inc. and Showa American Inc. |
| 1994 | Guangzhou Showa Shock Absorber Co., Ltd., (Now Guangzhou Showa Autoparts Co., Ltd., (current consolidated subsidiary) was established in China. |
| 1994 | Showa Kyushu Corporation was established in Kumamoto. |
| 1995 | Showa UK Ltd., (Now Nissin Showa UK Ltd., a consolidated subsidiary) was established in U.K. |
| 1996 | Shichuan Ningjiang Showa Shock Absorber Co., Ltd., Now Chengdu Ningjiang Showa Autoparts Co., Ltd., (a joint venture company) was established in China. |
| 1998 | Showa Canada Inc., a consolidated subsidiary, was established in Canada. |
| 2002 | Shanghai Showa Auto Parts Co.,Ltd.,a consolidated subsidiary, was established in China. |
| 2006 | Showa Autoparts (Thailand) Co., Ltd., was established in Thailand. |
| 2006 | Showa India Private Ltd., was established in India. |
| 2007 | Wuhan Plant of Guangzhou Showa Autoparts Co., Ltd., established in Wuhan, Hubei Province in China. |
| 2007 | Saitama No.2 Plant started production. |
| 2008 | Showa philosophy established. Gotemba No.1 Plant started production. |
| 2009 | Established Showa Regional Center (Thailand) Co.,Ltd.in Thailand. |
| 2010 | Showa Seiko co.,Ltd. moued to its own new facility in Hadano, Kanagawa Pref, Japan. Opened a motorcycle parts research & development facility within Showa Regional Center (Thailand) Co.,Ltd. |