Masafumi Miyamoto (1957 - ) was the founder of Square Co., Ltd. in 1983. Initially, he was the president of the company. In 1992, he left the company to pursue other interests, and Tetsuo Mizuno replaced him as president of Square. On departure, he still owned 50% of his company.

During the discussion of the merger of Square and Enix in 2002, his approval of the merger was essential because of his stake in Square. When the merger went through, .81 shares of Square resulted in 1 share of Enix.

Square Co., Ltd.

宮本雅史