Name of the Company  Ryokuseisha Corporation
 Address of head office  Nihonbashi Kodenmacho 16-6, Chuo-ku, Tokyo, 103-0001    MAP 
TEL (81)3-5644-7950 FAX (81)3-5644-7953
 Established  Established April 3, 1956(April 1951)
 The President and Representative Director  Takuro Yoshida
 The capital  13.2 million yen(authorized capital 20 million yen)
 Business contents  Consulting, Manufactureing, and supply for Various Aids to Navigation and related equipments(Sealight), Satellite communication buoy, IoT equipments for Marine and Fisheries.(Satellite buoy, monitoring etc.)
 Permission · Registration · License  ISO 9001 certified factory, Telecommunications operators (satellite communication), a Member of Japan Aids to Navigation Association(JANA)
 business hours  Weekday 9:00〜17:30
 Closed : Saturday · Sunday · Public Holiday
 Main bank  Bank of Tokyo-Mitsubishi UFJ, Tsukiji branch,
 Mizuho Bank, Nihonbashi branch, Yokoyamacho branch,
 Sumitomo Mitsui Banking Corporation Tsukiji branch.
Nearest Metro station
Tokyo Metro Hibiya line "Kodenmacho Station" three minutes by foot.
JR Sobu Line "Bakuro-cho Station" five minutes by foot.
Toei Shinjuku Line "Bakuroyokoyama Station" five minutes by foot.