Koichi Domoto (堂本 光一, Dōmoto Kōichi, born January 1, 1979) is a Japanese idol, singer, actor, singer-songwriter, composer, lyricist, television personality, voice actor. Along with Tsuyoshi Domoto (with whom he has no blood-relation), he is a member of the duo KinKi Kids, who holds the Guinness World Records for having the most consecutive No.1 singles since debut and the most consecutive years with a Japanese No.1 single, and is one of the top 20 best-selling artists of all time in Japan.
Although Domoto also actively works as a television actor and host, he is most famous for his musical SHOCK series, which he participates as the lead actor and director at the same time. SHOCK series started at the Tokyo Imperial Theatre in 2000, making him the youngest Zachō (chairman and lead role) and the first idol to perform at Imperial Theatre. With more than 1800 performances, SHOCK series is now the most-performed musical and the second most-performed theatre with a single-lead in Japan. In 2018, he starred in musical Knights’ Tale directed by John Caird as well.