| Birth Date: | 1987 11, df=yes |
| Birth Place: | Tokyo, Japan |
| Education: | Keio University |
| Height: | 1.77 m |
| Weight: | 62 kg |
| Event: | 800 metres |
| Club: | Fujitsu |
| Coach: | Joe Douglas |
| Pb: | 800 m: 1:46.16 (2009) |
| Updated: | 21 February 2013 |
is a Japanese track and field athlete, specializing in the 800 metres. He was Japanese record holder in the 800 metres from 18 October 2009, until 11 May 2014.
He graduated the Keio University. He trains at Fujitsu Track & Field team. As the winner of the 2012 Japanese Olympic Trials, Masato represented his home country in the 2012 Summer Olympics.[1] He has also competed in the 2007 and 2011 IAAF World Championships in Athletics. As of 2012, he has won six Japan Championships (2006 - 2007, 2009 - 2012).
Masato trains in the United States as a member of the Santa Monica Track Club.[2]
After his competition career, Masato currently is the head coach of the NIKE TOKYO TRACK CLUB in Tokyo, Japan.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 2006 | Asian Junior Championships | Macau | bgcolor=gold | 1st | 800 m | 1:51.34 |
| World Junior Championships | Beijing, China | 11th (sf) | 800m | 1:48.98 | ||
| 6th (h)[3] | 4 × 400 m relay | 3:07.27 | ||||
| 2007 | Asian Championships | Amman, Jordan | 9th (h) | 800 m | 1:52.23 | |
| World Championships | Osaka, Japan | 38th (h) | 800 m | 1:47.16 | ||
| 2008 | Asian Indoor Championships | Doha, Qatar | 3rd | 800 m | 1:49.30 | |
| 2009 | Universiade | Belgrade, Serbia | 4th | 800 m | 1:48.08 | |
| Asian Championships | Guangzhou, China | 5th | 800 m | 1:50.35 | ||
| 2010 | Asian Indoor Championships | Tehran, Iran | 3rd | 800 m | 1:54.71 | |
| Asian Games | Guangzhou, China | 4th | 800 m | 1:46.48 | ||
| 2011 | Asian Championships | Kobe, Japan | 4th | 800 m | 1:47.05 | |
| World Championships | Daegu, South Korea | 26th (h) | 800 m | 1:47.60 | ||
| 2012 | Olympic Games | London, United Kingdom | 37th (h) | 800 m | 1:48.48 | |
| 2013 | Asian Championships | Pune, India | 7th | 800 m | 1:51.13 | |