D. in Engineering from Waseda University. After graduating from university, he worked for Sony Corporation before founding Lunascape Corporation. He later became a founder of Japan Open Chain, a representative of G.U. Group, G.U. Technologies, and Japan Blockchain Infrastructure Co. 2002: Awarded "Best Author" by Information Processing Society of Japan 2008: Selected as "Asia's Best Young Entrepreneurs" by Business Week magazine 2011: Selected as one of the "100 People Who Will Rebuild Japan" by AERA magazine 2022: Selected as one of "100 Amazing Ventures" by Weekly Toyo Keizai in three web categories