In 2000 Handa cofounded the Spring Bud elementary school in China. In 2006 he established the International Sports Promotion Society (ISPS) and founded the University of Cambodia, later serving as the Chancellor and as a professor. He launched Akarusugiru Gekidan Tōshu (明るすぎる劇団・東州, The Too Lighthearted Theater Company – Toshu) for popular Japanese theater in May 2007, at the age of 56. In 2008 he established Worldwide Support for Development (WSD), where he currently serves as chair.
