- 1938
- Showa Aircraft Precision Works Ltd. was established to manufacture aircraft components.
- 1946
- Showa Manufacturing Co., Ltd. started production of automobile components.
- 1953
- Showa Manufacturing Co., Ltd. started 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
- Headquarters moved to Chuo-ku, Tokyo from Ohji-ku, Tokyo.
- 1974
- Asaba Plant started production.
- 1975
- Technical collaboration agreement signed with Kaifa Industry Co.,Ltd. in Taiwan a share of stocks acquired.
- 1978
- P.T.Showa Indonesia Manufacturing Co.,Ltd., (joint venture company) was established in Indonesia.
- 1979
- Showa American, Inc. was establsihed in U.S.A.
- 1981
- Showa Do Brasil Ltd., (joint venture company) was established in Brazil.
- 1985
- Showa stocks listed on section 1 of the Tokyo Stock Exchange.
- 1986
- Munjual Showa Ltd., (joint venture company) ,was established in India.
- 1986
- Sunbury Component Industries, Ltd., (joint venture company) was established in U.S.A.
- 1990
- Showa Europe, S.A. was established in Spain.
- 1990
- R&D Tochigi Center started its operation.
- 1991
- Headquarters moved to Saitama from Tokyo.
- 1993
- Renamed as SHOWA CORPORATION after the merger with Seikigiken Kogyo. Co.,Ltd. April 1.
Started production of steering systems.
Incorporated by merger, it is acquisition of stock of the subsidiary in the U.S., and Blanchester Fcm. Inc.
- 1993
- Summit Showa Manufacturing Co.,Ltd., (joint venture company) was established in Thailand.
- 1994
- American Showa, Inc. 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., (Changes its name to Guangzhou Showa Autoparts Co.,Ltd., joint venture company) was established in China.
- 1994
- Showa Kyushu Corporation was established in Kumamoto.
- 1995
- Showa UK Ltd., (Changes its name to Nissin Showa UK Ltd., joint venture company) was established in U.K.
- 1996
- Shichuan Ningjiang Showa Shock Absorber Co.,Ltd.,(Changes its name to Chengdu Ningjiang Showa Autoparts Co.,Ltd.,joint venture company) was established in China.
- 1998
- Showa Canada Inc. was established in Canada.
- 2002
- Shanghai Showa Auto Parts Co.,Ltd. was establsihed 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 2nd Plant started production.