シグマ・セブン
is a Japanese actor, voice actor and narrator from Nishitōkyō, Tokyo. His sons, Hirofumi Nojima and Kenji Nojima, are voice actors and his other son Satoshi is a nature writer. He was formerly affiliated with Tokyo Actor's Consumer's Cooperative Society and is attached to Sigma Seven as of 2016. He is most known for the roles of Saga in "Saint Seiya" and the Japanese voice of KITT in "Knight Rider".