Tadashi Yanai (?? ?, Yanai Tadashi, born 7 February 1949) is a Japanese billionaire businessman, the founder and president of Fast Retailing, of which Uniqlo ("unique clothing") is a subsidiary.
In June 2019, he was ranked as the 31st richest person in the world by Forbes, and the richest man in Japan, with an estimated net worth of US$24.9 billion.