| September 1963 |
Showa Valve established at Seribashi,Hikone by Kenichi Nakagawa(founder) |
| June 1968 |
Incorporated as joint-stock company; capital 5 million yen |
| February 1979 |
Head Office and factory moved upon completion of Koizumi Factory; started manufacture of automatic valves, special valves, and large size valves |
| July 1979 |
Authorized as approved inspection factory by Japan Water Works Association |
| February 1980 |
Authorized as Approved Factory by Japan Industrial Standard Association |
| September 1982 |
Granted Spec 6D for pipeline by American Petroleum Institute(API) |
| August 1985 |
Satoshi Nakagawa assumed the presidency |
| December 1985 |
Office in Hong Kong opened as first step of expanding overseas business ;Wellmate Ltd. established as local valve trading firm |
| October 1990 |
Dalian Showa Valve Co., Ltd. as joint venture, established in Dalian, China, and started local operations |
| March 1991 |
Tokyo Office opened. |
| August 1994 |
Awarded ISO 9001-International Quality Standard by Bureau Veritas Quality International |
| November 1997 |
Dalian New Showa Valve Co., Ltd. established in Dalian, as second factory in China |
| April 2006 |
Concluded a sole agent agreement for Japan market with Dezurik U.S.A. |
| February 2007 |
Tokyo Office moved to reinforce sales and services in the Tokyo metropolitan market |
| June 2008 |
Authorized as approved factory for new JIS marking system by BUREAU VERITAS |
| November 2009 |
Fukuoka Office opened to reinforce sales and services in the Kyushu market |
| November 2010 |
Awarded ISO 14001-International Environmental Management Systems by Bureau Veritas Quality International |
| February 2012 |
China factory was moved and re-build in order to expand the production capacity in China |
| September 2012 |
Osaka Office opened to reinforce sales and services in the Kansai market |
| October 2014 |
Opened Vietnam factory in the suburbs of Hanoi |
| April 2020 |
Opened Inae factory in Hikone Kanazawa town |
| June 2020 |
Yosuke Nakagawa assumed the presidency |
| June 2022 |
Opened the 2nd Vietnam factory in the suburbs of Hanoi |
