(二又 一成, Futamata Issei
?) is a veteran seiyū who was born on March 15, 1955 in Aomori Prefecture, Japan. He graduated from Towada Technical High School. He is a member of the Tokyo Actor's Consumer's Cooperative Society.
He is most known for the roles of Yuusaku Godai (Maison Ikkoku), Chibi (Urusei Yatsura), Kiyoshi Shusse (High School! Kimengumi), Kinkotsuman (Kinnikuman), and Saburou (Sazae-san).