History

May, 1946 Mr.Go Matsui, the late Chairman of the board, established Sankyo Seisakusho in Yamasaki-cho, HigashiSumiyoshi-ku, Osaka, and started the manufacture and sales of automatic control valves.
June, 1948 Established Tanimachi Branch Office in Kyuhoji-cho, Higashi-ku, Osaka
March, 1952 Moved the factory to Hirano-honmachi, HigashiSumiyoshi-ku, Osaka. Installed a boiler for steam examinations.
October, 1955 Established Sankyo Automatic Seisakusho Co., Ltd, in Hirano-honmachi, HigashiSumiyoshi-ku, Osaka with the capital of JPY 1,500,000.
July, 1959 Increased the capital to JPY 3,000,000.
August, 1959 Established Hiroshima Branch Office in Kokutaiji-cho, Hiroshima.
July, 1961 Constructed a safety valve manufacturing factory newly in HigashiSumiyoshi-ku, Osaka.
October, 1961 Increased the capital to JPY 6,000,000.
November, 1961 Increased the capital to JPY 12,000,000 on occasion of the merger between Sankyo Seisakusho and Sankyo Automatic Seisakusho Co., Ltd.
Corporate name was changed to Sankyo Seisakusho Co., Ltd.
January, 1962 Increased the capital to JPY 15,000,000.
February, 1963 Increased the capital to JPY 18,000,000.
June, 1963 Established Tokyo Branch Office in Chiyoda-ku, Tokyo
February, 1965 Established Hiroshima Sankyo Seisakusho Co., Ltd. in Kokutaiji-cho, Hiroshima.
May, 1967 Increased the capital to JPY 25,000,000.
January, 1968 Moved and newly constructed Head Office and Factory in Ohasuminami, Higasiosaka.
July, 1970 Moved Hiroshima Sankyo Seisakusho Co., Ltd. to the newly-built facilities in Koga-Kita Nishi-ku, Hiroshima.
October, 1971 S-K16 series Float Switches acquired the type approval from Lloyd’s Register Of Shipping.
March, 1972 Established Takamatsu Branch Office in Ogi-machi, Takamatsu.
September, 1972 S-K16 series Explosion-proof Float Switches acquired the type approval from Nippon Kaiji Kyokai.
April, 1973 Having been approved by the Ministry of International Trade and Industry as a certified High Pressure Gas manufacturing and testing facility.
Mr. Takao Matsui took the office of President.
November, 1973 Moved Head Office and Sales Department to Kitahorie, Nishi-ku, Osaka.
May, 1976 Having been approved by the Ministry of International Trade and Industry as a certified High Pressure Gas manufacturing and testing facility for special valves, including ultra-low temperature valves.
September, 1976 S-K16 series Float Switches acquired the type approval from Germanischer Lloyd’s.
February, 1981 Increased the capital to JPY 50,000,000
February, 1982 Increased the capital to JPY 75,000,000
March, 1983 Established Sankyo Seisakusho Co., Ltd.(Tokyo) in Chiyoda-ku, Tokyo
August, 1983 S-K704 series Diaphragm-Operated Valves acquired the type approval from Lloyd’s Register Of Shipping.
S-K800 series Cylinder Valves acquired the type approval from Lloyd’s Register Of Shipping.
S-K710,S-K74 and the other Solenoid Valves acquired the type approval from Lloyd’s Register Of Shipping.
March, 1984 S-K16 series Float Switches acquired the type approval from Det Norske Veritas.
August, 1985 S-K16 series Float Switches acquired the type approval from Nippon Kaiji Kyokai for the boiler.
November, 1985 S-K17 series Level Gauges acquired the type approval from Nippon Kaiji Kyokai.
June, 1990 Constructed the Factory newly in Wakamatsu-cho,Tondabayashi-shi and moved.
April, 1992 Purchased a resort apartment in the Kishu Shirahama hot spring for the rest facilities of the employee.
June, 1994 Moved Sankyo Seisakusho Co., Ltd.(Tokyo) to Nihonbashi Chuo-ku, Tokyo.
October, 1994 Has acquired the ISO9001 certification.
August, 1996 S-K170 series Level Gauges with alarm contact acquired the type approval from Lloyd’s Register Of Shipping.
October, 1996 S-K170 series Level Gauges with alarm contact acquired the type approval from Nippon Kaiji Kyokai.
December, 2000 Extended the inspection building in the factory.
June, 2001 Published the company history in commemoration of the 55th anniversary of foundation.
March, 2003 Developed S-K16 ES-N series Float switches newly.
February, 2004 Developed S-K102 series Safety Valves newly.
S-K16KS, YS series Float Switches acquired the type approval from Germanischer Lloyd’s.
July, 2004 S-K16KS,YS series Float Switches acquired the type approval from Bureau Veritas.
September, 2005 Extended the automatic warehouse system in the factory.
November, 2005 Established newly the air tank (25㎥) and the compressor (30MPa) for product inspection.
March, 2006 Extended the finished-goods place in the factory.
December, 2007 Joined Japan Ship Machinery & Association
S-K170 series Float Gauges acquired a patent in Japan.
October, 2008 Developed S-K423C series Pressure Regulating Valves newly.
October, 2009 Installed a large-sized parts washing machine in consideration of the load to environment.
May, 2011 Mrs. Takako Sugiyama took the office of President.
July, 2011 Developed S-K412A series Reducing Valves newly.
February, 2013 Developed S-K175 series Level Gauges newly.
November, 2013 S-K175 series Level Gauge acquired the type approval from Nippon Kaiji Kyokai.
February, 2014 S-K175 series Level Gauge acquired a patent in Japan.
November, 2014 Extended the painting booth in the factory.
August, 2015 Renovated the compressor for safety valves and the high-pressure valves to increase the productivity.
May, 2016 Passed 70th anniversary of the founding.
April,2017 Started joint researchi with Osaka Prefecture University.
May,2019 Established the large automatic warehouse system in tahe newly-built warehouse building.
January,2020 Developed S-K179 series Level Gauges newly.
June,2020 S-K179 series Level Gauges acquired the type approval from Nippon Kaiji Kyokai.
March,2021 Renovated the boiler equipment.
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