Seven-Eleven Japan Co., the nation's largest convenience store chain, has decided to appoint Director Ryuichi Isaka, 51, to succeed President Toshiro Yamaguchi, 62, company sources said Friday.

The new appointments will take effect in May after being confirmed at a board meeting early next month, they said. Chairman Toshifumi Suzuki, 76, will stay on in his current role.

The earnings of the company, part of Seven & I Holdings Co., are estimated to have grown in the year that ended in February.