Passage: Yoshiaki Tsutsumi (堤 義明, Tsutsumi Yoshiaki, born May 29, 1934) is a Japanese businessman.  During the Japanese economic bubble, Forbes listed Tsutsumi as the wealthiest person in the world during 1987–94 due to his extensive real estate investments through the Seibu Corporation, which he controlled. However, as a result of a series of scandals and his 2005 arrest, his net worth has fallen to such an extent that he was taken off the Forbes list of billionaires in 2007.

Question: What nationality is Tsutsumi?
Japanese