Tsukishima Kikai Co., Ltd. is involved in environmental related business operating in three segments Water Environment, Industrial, and Others. The Water Environment segment designs and constructs sludge disposal treatment plants for water filter and sewage treatment plants; singular machineries, as well as the operates, maintains, manages and repair water filters and sewage treatment plants. The Industrial segment is engaged in the design and construction of plants for chemicals, steel, foods, liquid waste disposal and solid waste disposal; the design, manufacture, and sale of crystallizers, filters, dryers, separators and gas holders, and the design and manufacture of vacuum technology applied devices, among others.