Mar.1958

Opened Osaka Branch Office

Aug.1958

Became a group company of Sankyo Co., Ltd.

Sep.1959

Opened Nagoya Sales Office

Mar.1961

Opened Kitakyushu Sales Office

Jan.1963

Acquired Yoshida Seisakusho Co., Ltd. and reopened as Osaka Plant

Jan.1965

Started marketing ball valves

Dec.1967

New headquarters and main plant were built at current site

May.1969

Tokyo Valve Industry Co., Ltd. was founded

Sep.1970

Opened Okayama Sales Office

Apr.1975

Acquired Tokyo Valve Industry Co., Ltd. and reopened as Tokyo Plant

Dec.1978

Tokyo plant acquired certification under High Pressure Gas Safety Act

Dec.1980

Opened Tokyo Sales Office and Osaka Sales Office

Dec.1981

Started marketing butterfly valves

Aug.1989

Integrated Tokyo plant into Head Office

May.1994

Integrated Tokyo Sales Office into the Headquarters

Apr.1995

Established Overseas Sales Department (now International Sales Department)

Apr.1999

Acquired ISO 9001 Certification

Oct.2000

Opened Osaka Manufacturing Center

Apr.2005

Became a group company of Seika Corporation

Sep.2006

Founded Tianjin Daiya Valve Co., Ltd. in PRC

Mar.2008

Acquired ISO 14001 Certification

Aug.2013

Opened TDV Shanghai Office

Mar.2015

Opened NDV (Thailand) Co., Ltd.

Nov.2022

Tianjin Daiya Valve Co., Ltd. Head Office Plant was newly constructed and moved to the current address