Masashi Hirose (広瀬正志 Hirose Masashi) is a Japanese seiyu born on November 6, 1947 in Osaka Prefecture, Japan. He was represented by Production Baobab. He was hospitalized on September 2014, and all his ongoing roles were recast. Besides Rikishiman, he is known for the roles of Ramba Ral (Mobile Suit Gundam), Gosterro (Blue Comet SPT Layzner), and Kiyoji Nakano (Lovely Complex).