Seiji Sasaki (born January 11, 1965) is a Japanese voice actor represented by Theatre Company Subaru.
Sasaki's notable roles include, but are not restricted to: Bruce Irvin (Tekken: The Motion Picture), Yoshiaki Sakai (Ayakashi), Sig Curtis (Fullmetal Alchemist), Blueno (One Piece), Ayamaro (Samurai 7), and Harris (Shinryaku! Ika Musume). He supplied the voice of Eikyō in the anime series He's Our Fallen Angel.