On Saturday, singer Yoshihiro Kai performed a concert in Tokyo as part of his current tour. During the show, he revealed that his former group, Kai Band, is planning to reunite later this year, though the details are still unclear.

"I have a big project this fall," he said. "Without a doubt, Kai Band is making a move."

Kai Band made its debut in 1974, but they broke up in 1986. Since then, they have occasionally reunited temporarily. Their last appearance together was a one-night concert this past December.