シグマ・セブン
is a Japanese actor and voice actor affiliated with Sigma Seven. Some of Matsumoto's most notable roles are Wataru Akiyama in "Initial D", Jean Havoc in "Fullmetal Alchemist", Magnum Ace in Shippū! Iron Leaguer, Gourry Gabriev in "Slayers" and Ryo Hibiki in "Sonic Soldier Borgman". His wife was voice actress Junko Sakuma, who died in March 2011.