Susumu Nishioka

Ruden Holdings Co., Ltd. engages in the home carpentry and real estate business. It operates through the following segments: House Care Business, Integrated Building Management Business, Integrated Real Estate Business, and Others. The House Care Business segment provides house wall, ceiling, and floor coating process, house facility replacement, reform construction, and interior and home merchandise sales. The Integrated Building Management Business segment offers cleaning, equipment, security, and upkeep management services. The Integrated Real Estate Business segment manages the planning, development, and sales of condominium. The Others segment includes software development. The company was founded on June 29, 2000 and is headquartered in Tokyo, Japan.

West Corp. (Japan) is a Japanese company that specializes in architectural hardware and rock making. The private company is based in Neyagawa, Japan. The company also develops original brands with high design quality such as high-term locks and dimple cylinders for architecture, "agaho", "gg", "", and "". The company's products include liver handles, push-pull handles, towel bars, and support bars. The company was founded in 1933 and provide various architectural hardware as OEM products to housing manufacturers and building materials manufacturers.