"You all have to pump this rhythm into your body," Daisuke Koshikawa shouted. "If you think this rhythm is not part of your body, you have to acquire it at any cost."

At 43, Koshikawa is the oldest of his 13-member theater troupe, D.K Hollywood. But at a recent rehearsal, where he energetically led his actors and actresses through a dance routine, he could easily have been mistaken for one of the youngest.

Koshikawa entered show business at age 23 as a comedian. Some might recognize him as a member of the comedy unit Chibikko Gang.