Koji Seto(瀬戸 康史Seto Kōji?, May 18, 1988(1988-05-18))is a Japanese actor and singer . His major works include lead roles as Wataru Kurenai inKamen Rider Kivaand Hiro inKoizora; and supporting roles as Satoru Okura in Atashinchi no Danshi , Ariake Yamato in Otomen , and Eiji Kikumaru in Tenimyu . He is currently starring as Mori Ranmaru in the drama,Gō ~Hime-tachi no Sengoku~.In 2010, he was named one of the most promising actors and actresses, placing 7th in a poll conducted by Oricon.Through his role withKamen Rider Kiva, he was also the lead vocalist of the J-Rock Band, TETRA-FANG . The lively and bright multi-talented Seto is nicknamed Setomaru (瀬戸丸) and is a member of the acting group D-BOYS .
