TriIs Incorporated engages in the construction consulting and fashion businesses in Japan and internationally. The company provides water-related construction consulting services, such as planning, design, surveying, and administration services; and constructs dams. It is also involved in the mail-order business through the operation of internet shopping malls and internet sites; and design, manufacture, import, export, and wholesale of clothing, handbags, accessories, and other leather products. In addition, the company offers its clothing and miscellaneous goods under the CLATHAS and Hamano brands, as well as licenses its trademarks. Further, it engages in the real estate and securities investment businesses. The company was incorporated in 1995 and is headquartered in Tokyo, Japan.