Tadashi Ōtsuka

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. == Achievements ==

BWF Grand Prix (1 title, 1 runner-up) The BWF Grand Prix had two levels, the BWF Grand Prix and Grand Prix Gold. It was a series of badminton tournaments sanctioned by the Badminton World Federation (BWF) which was held from 2007 to 2017. The World Badminton Grand Prix has been sanctioned by International Badminton Federation (IBF) from 1983 to 2006. ''Men's doubles'' : BWF Grand Prix tournament : IBF World Grand Prix tournament IBF International Challenge/Series (5 titles, 4 runners-up) ''Men's doubles'' Mixed doubles : BWF International Series tournament ==References==