ジャニーズJr.
On September 8, 2004, having passed an audition for Johnny's Jr., Ryosuke Hashimoto became a Johnny's trainee. In the summer of 2005, he was selected as a member of Johnny's Jr. unit J.J. Express. In 2008, he was selected to form the group TOP3 together with Yuma Sanada and Yuki Nozawa.