Sakai won a silver medal at the 2017 Indonesia Open
|Birth name||Kazumasa Sakai|
|Born||13 February 1990|
Kanazawa, Ishikawa, Japan
|Height||1.79 m (5 ft 10 in)|
|Weight||69 kg (152 lb)|
|Highest ranking||15 (8 March 2018)|
|Current ranking||38 (26 March 2019)|
East Asian GamesEdit
|2013||Binhai New Area Dagang Gymnasium, Tianjin, China||Wang Zhengming||11–21, 17–21||Bronze|
BWF World TourEdit
The BWF World Tour, announced on 19 March 2017 and implemented in 2018, is a series of elite badminton tournaments, sanctioned by Badminton World Federation (BWF). The BWF World Tour are divided into six levels, namely World Tour Finals, Super 1000, Super 750, Super 500, Super 300 (part of the HSBC World Tour), and the BWF Tour Super 100.
|2018||Indonesia Masters||Super 500||Anthony Sinisuka Ginting||13–21, 12–21||Runner-up|
The BWF Superseries, launched on 14 December 2006 and implemented in 2007, is a series of elite badminton tournaments, sanctioned by Badminton World Federation (BWF). BWF Superseries has two levels: Superseries and Superseries Premier. A season of Superseries features twelve tournaments around the world, which introduced since 2011, with successful players invited to the Superseries Finals held at the year end.
|2017||Indonesia Open||Srikanth Kidambi||11–21, 19–21||Runner-up|
BWF Grand PrixEdit
|2012||Russian Open||Vladimir Malkov||21–17, 21–17||Winner|
BWF International Challenge/SeriesEdit
|2015||Osaka International||Jeon Hyeok-jin||21–15, 17–21, 14–21||Runner-up|
|2015||Portugal International||Marius Myhre||21–13, 21–13||Winner|
|2015||China International||Qiao Bin||14–21, 12–21||Runner-up|
|2012||Scottish International||Anand Pawar||21–10, 11–21, 17–21||Runner-up|
|2012||Osaka International||Kazushi Yamada||Walkover||Winner|
- "選手・スタッフ紹介: 坂井 一将 Kazumasa Sakai". www.unisys.co.jp (in Japanese). Unisys. Retrieved 17 March 2017.
- "Players: Kazumasa Sakai". bwfbadminton.com. Badminton World Federation. Retrieved 17 March 2017.
- "BWF Launches New Events Structure". Badminton World Federation. 29 November 2017.
- "Action-Packed Season Ahead!". Badminton World Federation. 15 January 2018.