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Company History
- 1928September 3
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Tsurumi-Seiki Kosakusho foundedFounder: Masao Iwamiya
- 1935
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Designated as factory of the former Japanese navy
- 1945
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Designated as supervisory factory of the former Japanese navy
- 1947October 25
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Incorporated as Tsurumi-Seiki Kosakusho Co., Ltd.
Main services and products
- 1928
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Improved and began domestic production of Sigsby motorized depth sounder (winch)
- 1930
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Depth gauge No. 2 pulley - Honda tide gauge
- 1931
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Water sampler, Iwamiya bottom sampler, etc.
- 1949
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Ship log
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Company History
- 1954
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Began offering oceanic water quality observation technologies
- 1967
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Masao Iwamiya conferred the Order of the Sacred Treasure, 4th Class
- 1969
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Tsurumi-Seiki began technical partnership with Sippican and started domestic production of XBT
- 1971
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Company name changed to Tsurumi-Seiki Co., Ltd.
Main services and products
- 1951
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Self-recording current meter No. 2
- 1955
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Mechanical Bathy Thermograph (MBT)
Umitaka-Maru 3000 m hydraulic winch - 1962
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Salinity meter E-2
- 1968
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MTCM-3 (magnetic tape record current meter)
- 1969
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eXpendable Bathy Thermograph (XBT) deployed water temperature meter
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Company History
- 1975
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Hiroshi Iwamiya appointed President and Masao Iwamiya appointed Chairman
- 1977
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Began offering water quality observation technologies for terrestrial use, starting with the Miho Dam construction project
- 1978
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Company celebrated 50th anniversary
- 1981
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T.S.K America established in Seattle, participated in Shinkai 2000 project
- 1987
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Shirakawa Plant constructed
- 1989
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Participated in Shinkai 6500 project
- 1990
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Presented Prime Minister's Award for Shinkai 6500
- 1995
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T.S.K Service Center established
- 1996
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Participated in XCTD competition with Sippican off the coast of Bermuda; Tsurumi-Seiki XCTD certified as world standard
Main services and products
- 1981
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Microwave wave height meter
- 1985
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Autolauncher
- 1997
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eXpendable Conductivity, Temperature and Depth (XCTD) deployed salinity, water temperature sensor
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Company History
- 1999
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ISO 9001 certification
- 2003
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Began offering atmospheric observation technologies at Chichijima Island
- 2005
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Service Center celebrated 10th anniversary
- 2006
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Selected by the Ministry of Economy, Trade and Industry for the Vibrant GENKI Small and Medium Manufacturing Enterprises 300
- 2007
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Hiroshi Iwamiya conferred the Order of the Rising Sun
- 2010
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Michihiko Tachikawa appointed President and Hiroshi Iwamiya appointed Chairman
T.S.K Liaison Office established in India
Pressure testing facility constructed - 2011
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Selected as Yokohama Chizai Mirai Enterprise
- 2018
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Company celebrated 90th anniversary
Main services and products
- 2002
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NINJA profiling float (2,000 m)
- 2003
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Radiosonde atmospheric observation system
- 2004
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Direct Drive Volume Control (DDVC) winch
- 2005
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Airborne eXpendable Conductivity, Temperature and Depth (AXCTD) deployed salinity, water temperature sensor for aircraft
- 2012
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Deep NINJA profiling float (4,000 m)
- 2015
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Digi-auto M-6 (tabletop salinity meter)