Tsukishima Holdings Co., Ltd.
Japanese holding company for a machinery group providing water-environment and industrial plant engineering, listed on the Tokyo Stock Exchange Prime Market.
Last updated September 26, 2026
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Overview
Tsukishima Holdings Co., Ltd. is a Japanese holding company headquartered in Harumi, Chuo-ku, Tokyo, and listed on the Tokyo Stock Exchange Prime Market. It is the parent of the Tsukishima Holdings Group, a machinery and engineering group whose roots date to the founding of Tokyo Tsukishima Kikai Seisakusho in August 1905. The group operates primarily in two business domains: water-environment engineering and industrial engineering. In water environment, it designs and builds sludge treatment plants for water purification and sewage treatment facilities, including dewatering, drying and incineration equipment, and participates in PFI and DBO projects. In its industrial business, it designs and constructs plants for the chemical, steel and food industries, manufactures vacuum equipment and related components, and operates municipal and industrial waste treatment businesses. The company was long known as Tsukishima Kikai Co., Ltd. (月島機械株式会社). In April 2023 it changed its name to Tsukishima Holdings Co., Ltd. and transitioned to a holding-company structure. Under this structure, the water-environment business was succeeded by Tsukishima Aqua Solution Co., Ltd. and the industrial business by the new Tsukishima Kikai Co., Ltd. (formerly Tsukishima Machine Sales Co., Ltd.). The group includes numerous subsidiaries and affiliates in Japan and overseas, such as Tsukishima JFE Aqua Solution, Tsukishima Environment Engineering, Tsukishima J-Tech Maintenance Service, San-Eco Thermal, Sanshin Kogyo, Primix, Daido Chemical Engineering, TSK Engineering (Thailand), Tsukishima Engineering Malaysia, Tsukishima Engineering Singapore, TSK Engineering Taiwan, and BOKELA GmbH in Germany. The group has a long history of international expansion, establishing sales and engineering bases in Malaysia (1991), Thailand (1993), Taiwan (1994), China (2011), and representative offices in Hanoi, Jakarta, Europe (Karlsruhe) and Mumbai. Its shares were first listed on the Tokyo Stock Exchange in May 1949 and were designated a First Section issue in October 1961; following the Tokyo-Osaka exchange integration in July 2013, the company's shares are now traded on the TSE Prime Market. The company is a member of the Midori-kai and belongs to the Sanwa Group. Its corporate purpose is expressed as contributing to the world through environmental technology and creating the future.
History
The origins of Tsukishima Holdings lie in the founding of Tokyo Tsukishima Kikai Seisakusho in August 1905 (Meiji 38). In May 1917 (Taisho 6), the business was reorganized as a joint-stock company and Tsukishima Kikai Co., Ltd. was established. In December 1937 (Showa 12), it merged with Dai-Ni Tsukishima Kikai Co., Ltd. (the former Tsurumi Works) in Tsurumi-ku, Yokohama. In March 1944, it merged with Tsukishima Kikai Chuko Co., Ltd. In May 1949, its shares were listed on the Tokyo Stock Exchange, and in October 1961 they were designated a First Section issue. In October 1949, an Osaka office (now Osaka Branch) was opened. In October 1961, the shares were also listed on the Second Section of the Osaka Securities Exchange, and in November 1966 they were designated a First Section issue there. In October 1961, a research laboratory was opened in Chuo-ku, Tokyo. In April 1971, the operation and management division for pollution prevention equipment was spun off as Tsukishima Maintenance Co., Ltd. In March 1974, following revision of the Construction Business Act, the company received construction minister permission (Special-48) No. 3484. In January 1976, the Ichikawa Works was opened. In April 1979, the construction division was spun off as Tsukishima Plant Construction Co., Ltd., and the design, manufacture and sales division for sorting machines, grinding machines and metalworking machinery and tools was spun off as (old) Tsukishima Machine Sales Co., Ltd. In December 1985, the Tsurumi Works was closed to consolidate production. In November 1990, a new research laboratory was established and moved to Ichikawa City, Chiba Prefecture. In February 1991, Tsukishima Engineering Malaysia Sdn. Bhd. was established as a sales base in Malaysia. In April 1993, TSK Engineering (Thailand) Co., Ltd. was established in Thailand (now a consolidated subsidiary). In November 1994, TSK Engineering Taiwan Co., Ltd. was established in Taiwan. In December 1998, to enter the waste treatment business, the company acquired 20% of the outstanding shares of Kanuma Environmental Beautification Center Co., Ltd. (now San-Eco Thermal Co., Ltd., a consolidated subsidiary). In October 2000, the Environmental Process Development Center was opened in Ichikawa City, Chiba Prefecture. In November 2000, Tsukishima Maintenance Co., Ltd. and Tsukishima Plant Construction Co., Ltd. merged to form Tsukishima Techno Maintenance Service Co., Ltd. (now a consolidated subsidiary). In December 2001, the manufacturing division was spun off as Tsukishima Techno Machinery Co., Ltd. In March 2005, to strengthen the incineration-related field, the company acquired 74.6% of the outstanding shares of Nittetsu Kakoki Co., Ltd. (now Tsukishima Environment Engineering Co., Ltd., a consolidated subsidiary). In August 2005, Tsukishima Techno Machinery Co., Ltd. and (old) Tsukishima Machine Sales Co., Ltd. merged, with Tsukishima Techno Machinery as the surviving company. In April 2006, Samukawa Water Service Co., Ltd. (now a consolidated subsidiary), established with investment from the company, Tsukishima Techno Maintenance Service and others, began operation of the Samukawa Water Purification Plant wastewater treatment facility project under the PFI Act. In December 2008, the company absorbed and merged with its non-consolidated subsidiary Tsukishima Real Estate Co., Ltd. In March 2011, Tsukishima Environmental Machinery (Beijing) Co., Ltd. was established in China as a sales base (now a consolidated subsidiary). In July 2012, the consolidated subsidiary Tsukishima Techno Solution Co., Ltd. succeeded part of the industrial machinery business of Tsukishima Techno Machinery Co., Ltd. through a company split and changed its name to Tsukishima Machine Sales Co., Ltd. (now a consolidated subsidiary); the company absorbed and merged with its consolidated subsidiary Tsukishima Techno Machinery Co., Ltd. In July 2013, following the integration of the Tokyo and Osaka stock exchanges, the Osaka Securities Exchange First Section was integrated into the Tokyo Stock Exchange First Section. In December 2013, the head office was relocated to its current location and the Environmental Process Development Center was closed. In October 2014, the company acquired all shares of Daido Chemical Engineering Co., Ltd., making it a subsidiary. In December 2014, it acquired 83.33% of the shares of BOKELA GmbH (Germany), making it a subsidiary. In April 2023 (Reiwa 5), the company transitioned to a holding-company structure and changed its name to Tsukishima Holdings Co., Ltd. The water-environment business was succeeded by Tsukishima Aqua Solution Co., Ltd., and the industrial business by the new Tsukishima Kikai Co., Ltd. (formerly Tsukishima Machine Sales Co., Ltd.).
- 2014
Acquired Daido Chemical Engineering and 83.33% of BOKELA GmbH.
- 2013
Tokyo and Osaka exchanges integrated; head office relocated.
- 2012
Company split and merger of industrial machinery business; absorbed Tsukishima Techno Machinery.
- 2011
Established Tsukishima Environmental Machinery (Beijing) Co., Ltd.
- 2008
Absorbed and merged Tsukishima Real Estate Co., Ltd.
- 2006
Began operation of Samukawa Water Service PFI project.
- 2005
Acquired 74.6% of Nittetsu Kakoki (now Tsukishima Environment Engineering).
- 2001
Spun off manufacturing division as Tsukishima Techno Machinery Co., Ltd.
- 2000
Opened Environmental Process Development Center; merged maintenance and plant construction subsidiaries.
- 1998
Acquired 20% of Kanuma Environmental Beautification Center (now San-Eco Thermal).
Products and positioning
A century-old Japanese engineering group contributing to the world through environmental technology, organized as a holding company with water-environment and industrial business pillars.
Sludge dewatering equipment
Sludge drying equipment
Incineration equipment
Water purification and sewage treatment plant engineering
Chemical plant engineering
Steel plant engineering
Food plant engineering
Vacuum equipment and related components
Municipal and industrial waste treatment services
Sources6 sources
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