Tadashi Ōtsuka

Tadashi Ōtsuka
Personal information
Country	Japan
Born	(1978-04-30) April 30, 1978 Nagasaki
Height	1.7 m (5 ft 7 in)
Handedness	Right
Men's Doubles
Current ranking	9 (September 25, 2008)
BWF profile

Tadashi Ohtsuka (大束忠司, Ōtsuka Tadashi; born 30 April 1978) is a male badminton player from Japan.^[1]

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.

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

Year	Tournament	Partner	Opponent	Score	Result
2005	Dutch Open	Keita Masuda	Choong Tan Fook Lee Wan Wah	7–15, 4–15	Runner-up
2007	U.S. Open	Keita Masuda	Howard Bach Khan Malaythong	21–18, 21–11	Winner

  BWF Grand Prix tournament

  IBF World Grand Prix tournament

Men's doubles

Year	Tournament	Partner	Opponent	Score	Result
1999	Mexico International	Keita Masuda	Ma Che Kong Yau Tsz Yuk	7–15, 15–13, 10–15	Runner-up
2000	Cuba International	Keita Masuda	José Antonio Crespo Sergio Llopis	15–9, 15–2	Winner
2000	French International	Keita Masuda	Takuya Katayama Yuzo Kubota	15–6, 15–11	Winner
2003	Waikato International	Keita Masuda	Hendri Saputra Denny Setiawan	7–15, 15–12, 3–15	Runner-up
2003	Guatemala International	Keita Masuda	Howard Bach Kevin Han	15–6, 15–12	Winner
2004	Iran Fajr International	Keita Masuda	Liu Kwok Wa Albertus Susanto Njoto	4–15, 11–15	Runner-up
2004	Mauritius International	Keita Masuda	Liu Kwok Wa Albertus Susanto Njoto	15–11, 15–8	Winner

Mixed doubles

Year	Tournament	Partner	Opponent	Score	Result
2003	Mauritius International	Shizuka Yamamoto	Kristof Hopp Kathrin Piotrowski	10–15, 15–7, 15–7	Winner
2003	Waikato International	Shizuka Yamamoto	Daniel Shirley Sara Petersen	4–15, 8–15	Runner-up

  BWF International Series tournament

• Tadashi Ohtsuka at BWFBadminton.com
• Tadashi Ohtsuka at BWF.TournamentSoftware.com (archived)
• Tadashi Ohtsuka at Olympics.com
• Tadashi Ohtsuka at Olympedia
• Tadashi Ōtsuka – Athens 2004 at Team Japan (in Japanese) (in English)
• Tadashi Ōtsuka – Beijing 2008 at Team Japan (in Japanese) (in English)