Tadashi Ohtsuka
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Tadashi Ohtsuka (大束忠司, born April 30, 1978) is a male badminton player from Japan.
Ohtsuka 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.
Ohtsuka 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.