KinKi Kids
In the early days after KinKi Kids debuted, Domoto had several solo songs credited as KinKi Kids in their albums. He held his first solo concert tour in 2004, mainly performing his solo songs in group albums and songs from "SHOCK". On January 11, 2006, he released his first CD album "Koichi Domoto「Endless Shock」Original Sound Track," but was not regarded as his solo debut. The album peaked in Oricon and became the first musical soundtrack album to reach No.1, winning the Soundtrack album of the year in 21st Japan Gold Disc Award. He made his official CD debut on July 12, 2006, with a release of single "Deep in your heart/+MILLION but -LOVE," followed by the release of album "Mirror" on September 13.