is a male badminton player from Japan. Career Otsuka competed in badminton at the 2004 Summer Olympics in men's doubles with partner Keita Masuda. They had a bye in the first round, then were defeated in the round of 16 by Fu Haifeng and Cai Yun of China. He also competed in mixed doubles with partner Shizuka Yamamoto. They were defeated in the round of 32 by Robert Blair and Natalie Munt of Great Britain. Ohtsuka played at the 2007 BWF World Championships in men's doubles with Keita Masuda, and were defeated in the third round by the eventual champions Markis Kido and Hendra Setiawan, of Indonesia, 22-20, 21-19. External links BWF Player Profile 1978 births Living people People from Nagasaki Olympic badminton players of Japan Japanese male badminton players Badminton players at the 2004 Summer Olympics Badminton players at the 2008 Summer Olympics Nippon Sport Science University alumni Badminton players at the 2006 Asian Games Badminton players at the 2002 Asian Games Asian Games competitors for Japan