 In 2004, Adachi won the role of Eiji Kikumaru, the acrobatic player of Seigaku Middle School's tennis club, in the "Prince of Tennis" musicals, Tenimyu.From 2005 to 2006, he became the third actor to play Kikumaru as a member of the second generation Seigaku cast.He made his debut as Kikumaru on January 8, 2005 in the "Side Yamabuki" performance in Osaka.