山田涼介
On April 3, 2007, he joined the temporary group Hey! Say! 7, with soon to be fellow members of Hey! Say! JUMP, Yuya Takaki, Ryosuke Yamada, Yuto Nakajima and Yuri Chinen, starting with a public performance at KAT-TUN's "2007 Cartoon KAT-TUN II You" concert.