Lawson Inc. announced that it will promote Senior Executive Vice President Sadanobu Takemasu, 46, to president and chief operating officer, effective on June 1. Current President Genichi Tamatsuka will become chairman and chief executive officer with the right to represent the company. Tamatsuka will cover Lawson's convenience chain in Japan, while Takemasu will be in charge of overseas business as well as other domestic operations, including the Seijo Ishii high-end supermarket chain.