- Business
- Tsukishima Holdings Co., Ltd. (6332.T), formerly Tsukishima Kikai Co., Ltd., operates as a holding company overseeing environmental and industrial technologies businesses, providing plant systems, equipment, and services for water treatment, waste management, and material production worldwide; founded in 1905 and headquartered in Tokyo, Japan. Through its primary operating subsidiary Tsukishima Kikai Co., Ltd., the company designs, manufactures, and sells industrial machinery including dryers, filtration equipment such as centrifugal separators, drum filters, and horizontal belt filters, pressure vessels, heat exchangers, and plant systems for battery components, pharmaceuticals, food products, cosmetics, resins, sugar, and eco-friendly secondary lithium-ion battery materials; it also handles construction and repairs for environmental equipment treating waste fluids, solid waste, exhaust gases, and pollution control systems like waste liquid incinerators, fluidized incinerators, hydrochloric acid recovery units, and ammonia recovery equipment. In the water environmental segment, via Tsukishima JFE Aqua Solution Co., Ltd., it constructs and operates water purification plants, sewage treatment plants, biomass usage facilities, sludge recycling facilities, digestion tanks, dehydration equipment, and incinerators; offers chemical injection, sludge treatment systems, and biogas power generation; and provides public-private partnership (PPP) services including PFI, DBO projects, operations, maintenance, repairs, and renovations for sewer and water infrastructures, alongside sales of industrial chemicals and environmental supplies. Subsidiaries like PRIMIX Corporation supply emulsification, dispersion, mixing, and granulation equipment for fluids and fine particles used in batteries, chemicals, and cosmetics; Tsukishima Kankyo Engineering Ltd. focuses on waste treatment and environmental improvement equipment; SANSHIN KOGYO Co., Ltd. produces pressure vessels and handles plant construction; SUN ECO THERMAL Co., Ltd. manages waste collection, incineration, and thermal recycling power generation; BOKELA GmbH (Germany) delivers advanced filtration technologies; and TSK Engineering (Thailand) Co., Ltd. supports plant engineering in Southeast Asia, with operations spanning Japan, Asia, Europe, North America, and other regions. In April 2023, the company transitioned to a holding structure, renaming from Tsukishima Kikai Co., Ltd. and spinning off water and industrial businesses to dedicated subsidiaries; in October 2023, Tsukishima Aqua Solution merged with JFE Engineering's domestic water engineering to form Tsukishima JFE Aqua Solution Co., Ltd., enhancing synergies in water and sewage treatment; recent projects include starting operations at Oyama Energy Cycle Co., Ltd. for sludge treatment in April 2024 and Green Cycle Power IWAKI Co., Ltd. for resource utilization in February 2025, alongside treasury share repurchases totaling up to 13.8 billion yen announced in December 2024 and May 2025.