In 2007, he won the
All Japan Badminton Championships in men's singles and 7 international tournaments: the
Bahrain Satellite, the
Banuinvest International, the
Osaka International, the
Israel International, the
Mauritius International, the
Victorian International, and the
Italian International. At the
2012 Summer Olympics, he reached the quarter-finals in the men's singles, losing to
Lin Dan. In
2016, he did not advance to the knock-out stage after finishing second in the group stage. He beat
Petr Koukal of the Czech Republic, but was defeated by
Rajiv Ouseph of Great Britain. In 2017, he announced his retirement from the international badminton. He was ranked as high as No.6 in his career. ==Awards==