Kajima Corp. engages in the construction, real estate development, architectural design, and civil engineering businesses. It operates through the following segments: Civil Engineering, Building Construction, Real Estate Development and Other, Domestic Subsidiaries and Affiliates, and Overseas Subsidiaries and Affiliates. The Civil Engineering segment provides civil engineering works and construction service. The Building Construction segment offers building construction works. The Real Estate Development and Other segment covers real estate development and architectural, structural and engineering businesses. The Domestic Subsidiaries and Affiliates segment sells construction materials. It also deals in special construction and engineering services and manages leasing and rental businesses in Japan operated by domestic subsidiaries and affiliates. The Overseas Subsidiaries and Affiliates segment handles overseas construction and development projects. The company was founded by Iwakichi Kajima in 1840 and is headquartered in Tokyo, Japan.

Constructs offices, industrial buildings, residential houses and hotels

Tetra GmbH manufactures and markets fish food and aquarium products. It supplies food products, water conditioners, plant conditioners, technical equipment and medicinal products for fish keepers and pond owners. They also offer aquariums, decoration accessories and supplementary pet food products. The company was founded in 1951 and is headquartered in Melle, Germany.

FIRA contributes to the national economy by establishing a foundation for the sustainable use of fisheries resources.

Eko SpA is an Italian private company. The firm manufactures household applainces.

Marsima Aqua System Corp. is a private company headquartered in Japan with a presence in Japan that constructs dam, water gate and bridge.

Hainan Fansi Technology Co., Ltd., established on 2017-03-27, The scope of business includes engaging in the information profession,electronic product,Equipment,Technology development in the field of biotechnology,Technical Services,technical consulting,technology transfer;Research and development of environmentally friendly materials,Production,Sales,wholesale;Self-operated and agent electronics,Import and export business of communication products and technologies;Enterprise credit service,system integration,Business Management Consulting Services,Commodity Information Consulting Service.(General operating items self-management,Licensed business projects are operated on the basis of relevant licenses or approval documents)(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments.)

Aomi Construction Co. Ltd. engages in the provision of construction works and civil engineering works. The company is headquartered in Tokyo, Japan.

Wakachiku Construction Co., Ltd. engages in the provision of civil engineering and construction services. It operates through the following segments: Construction, Real Estate, and Others. The Construction segment deals with construction works such as marine civil engineering, land civil engineering, and building construction. The Real Estate segment sells and leases real estate properties locally. The Others segment includes ship supervision. The company was founded on May 23, 1890 and is headquartered in Tokyo, Japan.

Hunan Hydrogen Ceramic Technology Co., Ltd., established on 2019-05-27, Business scope includes new material technology promotion services;Ceramic research and development;computer technology development,Technical Services;Power equipment research and development;Research and development of environmentally friendly materials;Non-metallic minerals and products,building materials,hardware products,Electrical Equipment,computer,Wholesale of software and auxiliary equipment;Other unspecified wholesale business.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments,Do not engage in unauthorizedP2Ponline loan,Equity crowdfunding,internet insurance,Asset management and cross-border finance,Third party payment,virtual currency transaction,ICO,Internet financial services such as illegal foreign exchange.)(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)