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About OKM

Corporate History

Corporate-related information

January 1902Saw cutting factory founded by Seitaro Okumura in Gamo Town, Shiga Prefecture.
August 1952Transition to a factory specializing in valve cocks with expansions in manufacturing and sales.
May 1962Company name changed to Okumura Engineering Works Co., Ltd.
June 1969Established and moved offices to new head office and factory.
November 1975Completed construction of a large factory for machines.
April 1980Established a new integrated assembly line for butterfly valves.
October 1990Established OKM Valve Malaysia Sdn. Bhd.
August 1992Completed construction of a new factory.
April 1993Company name changed to Okumura Engineering Corporation.
October 1997Acquired ISO 9001 certification.
June 1998Completed construction of a new head office.
February 2003Established the Suzhou Okumura Valve Limited Company in China.
August 2006Established Suzhou Okumura Valve Trading Co., Ltd. to sell valves inChina.
December 2008Moved the Malaysia Factory to a new building.
July 2011Representative office opened in Ho Chi Minh City, Vietnam.
March 2012Due to a change in Chinese domestic law, closed Suzhou Okumura Valve Trading Co., Ltd.
December 2017Selected as the "Companies Driving Regional Growth" by the Ministry of Economy, Trade and Industry.
August 2018Acquired ISO 27001 certification.
March 2019Established OKM VALVE (JIANGSU) CO.,LTD in China.
April 2019Established Shiga Higashiomi Factory in Higashiomi City, Shiga Prefecture.
June 2020Selected as the "2020 GLOBAL NICHE TOP 100" by the Ministry of Economy, Trade and Industry.
October 2020Established Research and Development Center in Yasu City, Shiga Prefecture.
December 2020Listed on the Second Section of the Tokyo Stock Exchange.
February 2021Moved the Head Office to Yasu City, Shiga Prefecture.
March 2021Representative Office of the Republic of Korea opened in Busan Metropolitan City, Republic of Korea.
June 2021The Ministry of Economy, Trade and Industry (METI) selected the company’s pursuit of R&D concerning large-diameter butterfly valves for liquid hydrogen as a “Supporting Industry” project (a project to support the advancement ofstrategic fundamental technologies).
April 2022Moved to the Tokyo Stock Exchange Standard Market following the reorganization of the Tokyo Stock Exchange's stock market.
January 2023Awarded the top prize in the "Kansai Monodzukuri Shin-Sen 2023" by the Kansai Bureau of Economy, Trade and Industry.
February 2023Due to the move of base in China to OKM VALVE (JIANGSU) CO.,LTD, completed the liquidation the Suzhou Okumura Valve Limited Company.
March 2023Recognized as the "Health and Productivity Management Organization 2023" by the Ministry of Economy, Trade and Industry and the Japan Health Council.

Product-related information

May 1967Developed Type 703 Neo Pinch Valve.
March 1972Developed Type 501 Butterfly Valve.
August 1973Developed Type 505 Butterfly Valve.
August 1977Developed Type 515 Butterfly Valve.
March 1979Developed Type 336 Knife Gate Valve.
March 1982Developed Type ML-515 Electronic Butterfly Control Valve.
OctoberDeveloped Type 5400 High-Performance Butterfly Valve.
September 1984Developed Type 336D Knife Gate Valve.
June 1986Developed Type VAVTROL-S1 Electronically Controlled Air Conditioning Valve.
October 1988Developed Type VAVTROL-S2 Electronically Controlled Air Conditioning Valve.
July 1992Developed Type 601A Aluminum Butterfly Valve.
Developed Type 615X General-Purpose Butterfly Valve.
Developed Type 606F Flange-Type Butterfly Valve.
June 1993Developed Type Jumbo Butterfly Valve.
January 1995Developed Type 336S Knife Gate Valve.
November 1997Developed Type 6424 Fire-Safe Butterfly Valve.
August 1998Developed Type 622H High-Pressure Butterfly Valve.
March 1999Developed Type 607F Flange-Type Butterfly Valve.
October 1999Developed Type VAVTROL-DN Electronic Butterfly Valve.
June 2000Developed Type 602 Aluminum Die Cast Butterfly Valve.
Developed Type 336J Multi-Seat Type Knife Gate Valve.
August 2001Developed Type 618H High-Pressure Butterfly Valve.
April 2002Developed Type 612X General-Purpose Butterfly Valve.
Developed Type 606K Flange-Type Butterfly Valve.
Developed Type 603A Aluminum Die Cast Butterfly Valve (PPS Disc).
Developed Type 5410 High-Performance Butterfly Valve.
April 2004Remodel of Type 336J Knife Gate Valve to lost wax product.
October 2005Developed Type 111S, 110S, 121S, and 120S Wafer Check Valves.
August 2006Developed Type 603S and 612S butterfly valves for use with powders.
April 2008Developed a marine hatch rotary sluice valve.
Developed Type 110Z and 120Z Wafer Check Valves.
March 2010Developed Type 618F and 622F Flange-Type Butterfly Valve for High-Pressure.
December 2011Developed Type 635N Fluororesin-Lined Butterfly Valve.
April 2016Developed the "Exv Series" Butterfly Valve for Marine Emission Control System.
September 2016Remodel of the VAVTROL-DN Type Electronic Butterfly Valve.
April 2017Developed Type 637N Fluororesin-Lined Butterfly Valve.
April 2021Developed EFVLP low temperature valve butterfly valve for LPG.
April 2021Developed EFVLN low temperature valve butterfly valve for LNG.
April 2022Developed the "Exv MarkⅡ" Butterfly Valve for Marine Emission Control System.
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