Official site Name: 瀬戸康史 (せと こうじ) / Seto Koji
Nickname: Setomaru
Profession: Actor and Singer
Birthdate: 1988-May-18
Birthplace: Fukuoka, Japan
Height: 175cm
Weight: 52 kg
Star sign: Taurus
Blood type: A
Talent agency: Watanabe Pro
Special Skills: Imitations, soccer, hip hop dance
Vocalist of the J-Rock band Tetra-Fang.J-group: D-BOYS
Dramas:* Gou as Ranmaru Mori (NHK, 2011)
*
Tumbling as Yuta Takenaka (TBS, 2010)
* Rinne no Ame as Shuhei Mikami (Fuji TV, 2010)
* Otomen as Ariake Yamato (Fuji TV, 2009)
*
Atashinchi no Danshi as Satoru Ookura (Fuji TV, 2009)
* Kamen Rider Decade guest starring as Wataru Kurenai (TV Asahi, 2009, episode 1 and 31)
* Koizora as Hiroki "Hiro" Sakurai (TBS, 2008)
* Kamen Rider Kiva as Wataru Kurenai / Kamen Rider Kiva (TV Asahi, 2008)
* Abarenbo Mama as Naoya Abe (Fuji TV, 2007)
* Happy Boys as Kyoichi Segawa (TV Tokyo, 2007)
* Rocket Boys as Makoto Kanno (TV Tokyo, 2006)
Movies:* Runway☆Beat (2011) as Biito "Beat" Mizorogi
* Kamen Rider × Kamen Rider Double & Decade: Movie War 2010 as Wataru Kurenai
* Ju-On - Black Girl (2009) as Tetsuya
* Kamen Rider Kiva: King of the Castle in the Demon World (2008) as Wataru Kurenai
* Shakariki (2008) as himself
* Kamen Rider Den-O & Kiva: Climax Deka (2008) as Wataru Kurenai
* Tenshi ga Kureta Mono(2007) as Izamu Hayama
* Tonari no Yaoi-chan as Chibe-kun (2007)
* Hit Parade as Tiger's member (2006)