出羽海部屋
, formerly known as Musashigawa stable, is a stable of sumo wrestlers, part of the Dewanoumi "ichimon" or group of stables. It was set up in August 1981 by former "yokozuna" Mienoumi, who branched off from Dewanoumi stable. Since its founding Dewanoumi had a long tradition of not permitting its coaches to break away and form new stables, and Mienoumi was the first to amicably depart Dewanoumi stable since Tochigiyama set up Kasugano stable 62 years earlier. By the early 2000s it had become the strongest stable in sumo, with a "yokozuna", three "ōzeki" and several other top division wrestlers. Wrestlers from the stable won six consecutive tournaments from March 1999 to January 2000. In September 2008 Mienoumi also became head of the Sumo Association.