A Tokyo-based seafood wholesaler has become the first business in Japan to be certified by a London-based conservation group as a supplier of seafood produced by sustainable fishing, officials of the group said Monday.

Based in Tokyo's Tsukiji district, where the famed fish market is located, Kamewa Shoten will start selling over the Internet next month fillets of Alaskan salmon with a special label issued by the Marine Stewardship Council, officials at the council said.

The council is an independent nonprofit organization that promotes well-managed, sustainable fisheries through a certification program for fisheries or companies.