Corporate History

August, 1905 Founded as Tokyo Tsukishima Kikai Seisakusho.
May, 1917 Changed to a stock company and named Tsukishima Kikai Co., Ltd.
December, 1937 The company merged with Dai-ni Tsukishima Kikai Co., Ltd. (former Tsurumi Factory), which was located in Tsurumi ward, Yokohama City.
May, 1949 The company's shares were listed on the Tokyo Stock Exchange (listed in the First Section in October, 1961).
October, 1949 The Osaka satellite office was opened (current Osaka Sales Branch Office).
October, 1961 The company's shares were listed on the Second Section of the Osaka Securities Exchange (listed in the First Section in November, 1966).
October, 1961 Laboratory was opened in Chuo ward, Tokyo.
April, 1971 The pollution control-related equipment operation and management division was spun off and a subsidiary, Tsukishima Maintenance Co., Ltd., was founded.
March, 1974 Company was accredited by Minister of Construction (special-48), No. 3484, due to changes in the Construction Industry Act.
January, 1976 The Ichikawa Factory was opened.
April, 1979 The construction work division was spun off and a subsidiary, Tsukishima Plant Construction Co., Ltd., was founded.
April, 1979 The design, manufacturing, and sales divisions of sorting machine, attritor, and metal work machinery and instruments were spun off and Tsukishima Machine Sales Co., Ltd. was founded.
December, 1985 The Tsurumi Factory was closed due to consolidation of production systems.
November, 1990 The laboratory was relocated and newly opened in Ichikawa City, Chiba.
February, 1991 Tsukishima Engineering Malaysia Sdn. Bhd. was founded in Malaysia as a local business office.
April, 1993 TSK Engineering (Thailand) Co., Ltd. was founded in Thailand as a local business office.
November, 1994 TSK Engineering Taiwan Co., Ltd. was founded in Taiwan as a local business office.
December, 1998 The company acquired 20% of total issued shares of Kanuma Kankyo-bika Center (current SUN ECO THERMAL Co., Ltd.as a consolidated subsidiary), providing the company's entrance into the waste-disposal industry.
October, 2000 The Environment Process Development Center was opened in Ichikawa city, Chiba.
November, 2000 Tsukishima Maintenance Co., Ltd. and Tsukishima Plant Construction Co., Ltd. merged to form Tsukishima Techno Maintenance Service Co., Ltd. (currently a consolidated subsidiary).
December, 2001 The manufacturing division was spun off and a subsidiary, Tsukishima Techno Machinery Co., Ltd., was founded.
March, 2005 The company acquired 74.6% of total issued shares of Nittetu Chemical Engineering Ltd. (current Tsukishima Kankyo Engineering Ltd.), making it a consolidated subsidiary and reinforcing the company's position in the incineration-related industry.
August, 2005 Tsukishima Techno Machinery Co., Ltd. and former Tsukishima Machine Sales Co., Ltd. were merged to enhance and reinforce the company's equipment service business; Tsukishima Techno Machinery Co., Ltd. was the surviving company (currently a consolidated subsidiary).
April, 2006 Samukawa Water Service Co., Ltd. (currently a consolidated subsidiary), which was founded through the investment of Tsukishima Techno Maintenance Service Co., Ltd., etc., was fully equipped and developed, and started operation on the Samukawa Water Purification Plant Drainage special business of the Public Enterprises Agency of Kanagawa Prefecture, pursuant to the Act on Promotion of Private Finance Initiative (PFI Act).
December, 2008 The company merged with Tsukishima Fudosan Co., Ltd., a non-consolidated company.
March, 2011 TSK Engineering China Co., Ltd. was founded in China as a local business office.
July, 2012 Tsukishima Techno Solution Co., Ltd. acquired the industrial machinery business from Tsukishima Techno Machinery Co., Ltd. and changed its name to Tsukishima Machine Sales Co., Ltd.
Tsukishima Kikai Co., Ltd. merged with Tsukishima Techno Machinery Co., Ltd. in an absorption type merger.
December, 2013 Headquarters were relocated to the current location.
The Environment Process Development Center was closed and that function was integrated with Ichikawa Research & Development Center.
October, 2014 The company acquired the entire issued share capital of DAIDO CHEMICAL ENGINEERING CORP., making it a subsidiary.
December, 2014 The company acquired 83.33% share capital of BOKELA GmbH(incorporated in Germany), making it a subsidiary.
July, 2017 The company acquired the issued share capital of SANSHIN KOGYO Co.,Ltd., making it a subsidiary.

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