| 1883-07 |
Founded as Tokyo Tsukishima Machinery Manufacturing |
| 1905-08 |
Founded as Tokyo Tsukishima Machinery Manufacturing |
| 1905-08 |
August 1905 (Meiji 38) |
| 1916-05 |
Organized into a corporation and established Tsukishima Machinery Co., Ltd. |
| 1917-05 |
Organized into a corporation and established Tsukishima Machinery Co., Ltd. |
| 1937-12 |
Merged with Second Tsukishima Machinery Co., Ltd. (formerly Tsurumi Factory) located in Tsurumi-ku, Yokohama City |
| 1949-05 |
Listed on the Tokyo Stock Exchange (designated as First Section stock in October, Showa 36) |
| 1949-05 |
Listed our shares on the Tokyo Stock Exchange |
| 1949-10 |
Established Osaka Branch (now Osaka Office) |
| 1955-05 |
Listed the company's shares on the Tokyo Stock Exchange (designated as a First Section stock in October Showa 36) |
| 1955-10 |
Established Osaka Branch (now Osaka Office) |
| 1961-10 |
Established a research institute in Chuo-ku, Tokyo |
| 1961-10 |
Listed our shares on the Osaka Securities Exchange Second Section |
| 1961-10 |
Listed the company's shares on the Osaka Securities Exchange Second Section (designated as a First Section stock in November Showa 41) |
| 1971-04 |
Separated and established a subsidiary, Tsukishima Maintenance Co., Ltd., to manage pollution prevention equipment operations |
| 1971-10 |
Established Osaka Branch (now Osaka Office) |
| 1974-03 |
Obtained construction industry permit (Special-48) No. 3484 following revisions to the Construction Business Act |
| 1976-01 |
Established Ichikawa Factory |
| 1976-03 |
Obtained construction industry permit (Special-48) No. 3484 following amendments to the Construction Business Act |
| 1979-04 |
Separated and established Tsukishima Plant Construction Co., Ltd., a subsidiary |
| 1979-04 |
Separated and established (former) Tsukishima Machine Sales Co., Ltd., specializing in design, manufacturing, and sales of sorting machines, crushers, and metal processing machinery and tools |
| 1979-04 |
Established Ichikawa Factory |
| 1981-04 |
Separated and spun off the construction division, establishing Tsukishima Plant Construction Co., Ltd. |
| 1981-04 |
Separated and spun off the design, manufacturing, and sales division of sorting machines, crushing machines, and metal processing machinery and tools, establishing (former) Tsukishima Machine Sales Co., Ltd. |
| 1982-04 |
Separated and established Tsukishima Plant Construction Co., Ltd. as a subsidiary |
| 1984-12 |
Closed Tsurumi Factory to consolidate production system |
| 1985-04 |
Separated and established (former) Tsukishima Machine Sales Co., Ltd., specializing in design, manufacturing, and sales of sorting machines, crushers, and metal processing machinery and tools |
| 1985-12 |
Closed Tsurumi Factory for production streamlining |
| 1986-12 |
Closed Tsurumi Factory for production streamlining |
| 1990-11 |
Relocated and established a research institute in Ichikawa City, Chiba Prefecture |
| 1991-02 |
Established Tsukishima Engineering Malaysia Sdn. Bhd. as a sales base in Malaysia |
| 1993-04 |
Established TSK Engineering (Thailand) Co., Ltd. as a sales base in Thailand (currently a consolidated subsidiary) |
| 1994-11 |
Established TSK Engineering Taiwan Co., Ltd. as a sales base in Taiwan |
| 1998-11 |
Established TSK Engineering Taiwan Co., Ltd. as a sales base in Taiwan |
| 1998-12 |
Acquired 20% of issued shares of Kanuma Environmental Beautification Center Co., Ltd. (now Saneo Eco Thermal Co., Ltd.) to enter waste management business (current consolidated subsidiary) |
| 2000-10 |
Opened Environmental Process Development Center in Ichikawa City, Chiba Prefecture |
| 2000-11 |
Merged Tsukishima Maintenance Co., Ltd. and Tsukishima Plant Construction Co., Ltd. to form Tsukishima Techno Maintenance Co., Ltd. (current consolidated subsidiary) |
| 2000-12 |
Entered waste disposal business by acquiring 20% of issued shares of Kanuma Environmental Beautification Center Co., Ltd. (now Saneo Thermal Co., Ltd.), a subsidiary |
| 2001-10 |
Established an Environmental Process Development Center in Ichikawa City, Chiba Prefecture |
| 2001-11 |
Tsukishima Maintenance Co., Ltd. and Tsukishima Plant Construction Co., Ltd. merged to become Tsukishima Techno Maintenance Service Co., Ltd. (currently a consolidated subsidiary) |
| 2001-12 |
Separated and spun off the manufacturing division to establish Tsukishima Techno Machinery Co., Ltd. |
| 2002-12 |
Separated and independently established the manufacturing division, founding Tsukishima Techno Machinery Co., Ltd. |
| 2003-03 |
Acquired 74.6% of issued shares of Nittetsu Koki Co., Ltd. (now Tsukishima Environment Engineering Co., Ltd.) to strengthen incineration-related fields |
| 2005-03 |
Acquired 74.6% of issued shares of Nippon Steel Chemical Engineering Co., Ltd. (now Tsukishima Environmental Engineering Co., Ltd.) to strengthen incineration-related fields (currently a consolidated subsidiary) |
| 2005-08 |
To enhance and strengthen the equipment service business, Tsukishima Techno Machinery Co., Ltd. merged with (former) Tsukishima Machine Sales Co., Ltd., with Tsukishima Techno Machinery Co., Ltd. as the surviving company. |
| 2006-04 |
Regarding Kanagawa Water Service Co., Ltd., established with investment from our company and others (currently a consolidated subsidiary), the facility development for the Kanagawa Prefectural Waterworks Bureau's Kanagawa Water Purification Plant Drainage Treatment Facility under the PFI law has been completed and operations have commenced |
| 2006-04 |
Regarding Kanagawa Water Service Co., Ltd. (now a consolidated subsidiary), established with investment from our company and others, the facility development for the Kanagawa Prefectural Enterprise Agency's specific project for wastewater treatment plant at Kanagawa Prefectural Kanagawa Water Purification Plant, carried out under the PFI law, has been completed, and operations have commenced. |
| 2006-08 |
Merged Tsukishima Techno Machinery Co., Ltd. and the former Tsukishima Machine Sales Co., Ltd., with Tsukishima Techno Machinery Co., Ltd. as the surviving company |
| 2008-12 |
Absorbed and merged Tsukishima Real Estate Co., Ltd., a non-consolidated subsidiary of our company. |
| 2009-12 |
Absorbed and merged Tsukishima Real Estate Co., Ltd., a non-consolidated subsidiary |
| 2010-12 |
Absorbed Tsukishima Real Estate Co., Ltd., a non-consolidated subsidiary |
| 2011-03 |
Established Tsukishima Environmental Protection Machinery (Beijing) Co., Ltd. as a sales base in China (currently a consolidated subsidiary) |
| 2012-07 |
Tsukishima Techno Solution Co., Ltd. succeeded part of Tsukishima Machinery's business through a company split, changed its trade name to Tsukishima Machine Sales Co., Ltd. (currently a consolidated subsidiary), and merged with Tsukishima Machinery Co., Ltd. |
| 2012-07 |
Our 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 trade name to Tsukishima Machine Sales Co., Ltd. (now a consolidated subsidiary). |
| 2012-07 |
Our company absorbed and merged Tsukishima Techno Machinery Co., Ltd., a consolidated subsidiary. |
| 2013-07 |
Due to the market integration of the Tokyo Stock Exchange and Osaka Exchange, the Osaka Exchange First Section was integrated into the Tokyo Exchange First Section, and the headquarters was relocated to the current location |
| 2013-07 |
Due to the market integration of the Tokyo Stock Exchange and Osaka Exchange, the Osaka Exchange First Section was integrated into the Tokyo Exchange First Section. |
| 2013-12 |
Relocated headquarters to the current location. |
| 2013-12 |
Closed the Environmental Process Development Center. |
| 2014-10 |
Closed the Environmental Process Development Center |
| 2014-10 |
Acquired all shares of Daito Chemical Engineering Co., Ltd., making it a subsidiary |
| 2014-12 |
Acquired 83.33% of shares of BOKELA GmbH (Germany) and made it a subsidiary |
| 2017-04 |
Regarding Owari Water & Energy Co., Ltd. (currently a consolidated subsidiary), the facility development for the facilities including the Inuyama Water Purification Plant operated by Aichi Prefectural Government Waterworks Bureau has been completed and operations have started |
| 2017-04 |
Our company, Owari Water & Energy Co., Ltd., established with investment from our company and others (now a consolidated subsidiary), commenced operations after completing facility development for the Aichi Prefectural Enterprise Agency's project for wastewater treatment and power generation facilities at Inuyama Water Purification Plant, under the PFI law. |
| 2017-07 |
Acquired shares of Sanshin Industries Co., Ltd. and made it a subsidiary |
| 2019-04 |
Established Muroran Factory |
| 2020-01 |
Established R&D Center in Yachiyo City, Chiba Prefecture, and closed Ichikawa Business Office |
| 2020-01 |
Established R&D Center in Yachiyo City, Chiba Prefecture. |
| 2020-01 |
Closed Ichikawa Business Office. |
| 2020-05 |
Acquired shares of Primix Holdings Co., Ltd. and made its business company, Primix Co., Ltd., a subsidiary |
| 2021-04 |
Started operation of BioCall Kyoto Toba Co., Ltd. |
| 2021-04 |
Established Muroran Factory. |
| 2021-04 |
Our company, invested in by our company and others, established BioCall Toba Co., Ltd. (now a consolidated subsidiary). Operations began after completing the facility development for the Toba Water Environment Conservation Center's sludge solid fuel project, commissioned as a DBO project by the City of Toba. |
| 2022-04 |
Moved from the Prime Market to the First Section of the Tokyo Stock Exchange due to market classification review |
| 2022-04 |
Relocated headquarters and closed the Environmental Process Development Center |
| 2022-10 |
Acquired all shares of Daido Chemical Engineering Co., Ltd., and made it a subsidiary |
| 2023-04 |
Tsukishima Kikai Co., Ltd. transitioned to a holding company structure and became Tsukishima Holdings Co., Ltd. Water environment business was succeeded by Tsukishima Aqua Solution Co., Ltd., and industrial business by Tsukishima Kikai Co., Ltd. |
| 2023-04 |
Started operation of Ichihara Bio Cycle Co., Ltd. |
| 2023-04 |
Tsukishima Machinery Co., Ltd. transitioned to a holding company structure and became Tsukishima Holdings Co., Ltd. |
| 2023-04 |
Water environment business was succeeded by Tsukishima Aqua Solution Co., Ltd., and industrial business by Tsukishima Machinery Co., Ltd. |
| 2023-04 |
Our company, invested in by our company and others, established Ichihara BioCycle Co., Ltd. (now a consolidated subsidiary). Operations started after completing the facility development for the Matsugashima Wastewater Treatment Sludge Solid Fuel Project, commissioned as a DBO project by the City of Ichihara. |
| 2023-04 |
Tsukishima Machinery Co., Ltd. transitioned to a holding company structure and became Tsukishima Holdings Co., Ltd. Water environment business was succeeded by Tsukishima Aqua Solution Co., Ltd., and industrial business was inherited by Tsukishima Machinery Co., Ltd. |
| 2023-10 |
Tsukishima Aqua Solution Co., Ltd. changed its trade name to Tsukishima JFE Aqua Solution Co., Ltd. and newly consolidated multiple SPCs |
| 2023-10 |
Tsukishima Aqua Solution Co., Ltd. merged with JFE Engineering Co., Ltd.'s domestic water engineering business and changed its trade name to Tsukishima JFE Aqua Solution Co., Ltd. |
| 2023-10 |
Our company, J-Aqua Service Equipment Co., Ltd. (renamed from JFE Aqua Service Equipment Co., Ltd.), along with seven special purpose companies (SPCs) including Bay Eggs Inc., Yokohama Bay Link Inc., Hakone Waterworks Partners Inc., Toyohashi Bio Will Inc., Nagaoka Bio Cube Inc., Aqua Pex Oyama Inc., and Aqua Pex Sakai Inc., was newly consolidated. |
| 2024-04 |
Started operation of Koyama Energy Cycle Co., Ltd. |
| 2024-04 |
Our company, invested in by our company and others, established Oyama Energy Cycle Co., Ltd. (now a consolidated subsidiary). Operations began after completing the facility development for the Oyama Water Treatment Center's sludge treatment and utilization facilities, commissioned as a PFI project by Oyama City. |
| 2024-10 |
Tsukishima Environmental Engineering Co., Ltd. absorbed Daido Chemical Engineering Co., Ltd. |
| 2025-02 |
Started operation of a project ordered as a PFI project from Iwaki City |
| 2025-02 |
Green Cycle Power Iwaki Co., Ltd., established with investment from Tsukishima JFE Aqua Solution Co., Ltd. and others, was ordered by Iwaki City as a PFI project. The development of the sewage sludge utilization project at the Iwaki City Central Purification Center and others has been completed, and operations have commenced. |
