Keijuro Matsui (popularly known as KJ) (born October 16, 1985) is a Japanese professional basketball player for the Kagawa Five Arrows of the B.League. He is a former guard for the Columbia Lions basketball team at Columbia University and the first Japanese native basketball player in NCAA Division I history. Matsui also played in the 2005 Nike Hoop Summit for the World Select Team, only the second Japanese to do so. In the summit he scored seven points in 11 minutes. Following his collegiate career, he relocated to his native country, where he has played ever since.
 | |
| No. 16 – Kagawa Five Arrows | |
|---|---|
| Position | Guard |
| League | B.League |
| Personal information | |
| Born | October 16, 1985 Suginami, Tokyo, Japan |
| Listed height | 6 ft 2 in (1.88 m) |
| Listed weight | 183 lb (83 kg) |
| Career information | |
| High school | Montrose Christian School (Rockville, Maryland) |
| College | Columbia (2005–2009) |
| NBA draft | 2009: undrafted |
| Playing career | 2009–present |
| Career history | |
| 2009–2010 | Rera Kamuy Hokkaido |
| 2010–2011 | Hitachi SunRockers |
| 2011–2017 | Toyota Alvark |
| 2017–2019 | SeaHorses Mikawa |
| 2019–2021 | Kyoto Hannaryz |
| 2021–2023 | Toyama Grouses |
| 2023–present | Kagawa Five Arrows |
Career statistics
| GP | Games played | GS | Games started | MPG | Minutes per game |
| FG% | Field goal percentage | 3P% | 3-point field goal percentage | FT% | Free throw percentage |
| RPG | Rebounds per game | APG | Assists per game | SPG | Steals per game |
| BPG | Blocks per game | PPG | Points per game | Bold | Career high |
| † | Denotes seasons in which Matsui won an championship |
| * | Led the league |
| Year | Team | GP | GS | MPG | FG% | 3P% | FT% | RPG | APG | SPG | BPG | PPG |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2009-10 | Hokkaido | 41 | 17.05 | .413 | .399 | .757 | 1.78 | 0.44 | 0.27 | 0 | 6.76 | |
| 2010-11 | Hitachi | 36 | 22.17 | .417 | .349 | .800 | 1.58 | 0.81 | 0.28 | 0.05 | 8.42 | |
| 2011-12† | Toyota | 42 | 18.83 | .449 | .424 | .813 | 1.76 | 0.55 | 0.36 | 0.07 | 8.69 | |
| 2012-13 | Toyota | 42 | 18.7 | .458 | .494* | .814 | 2.2 | 0.8 | 0.2 | 0.1 | 9.6 | |
| 2013-14 | Toyota | 54 | 21.6 | .446 | .408 | .839 | 1.8 | 1.0 | 0.5 | 0.0 | 10.7 | |
| 2014-15 | Toyota | 54 | 5 | 22.3 | .406 | .432 | .676 | 2.3 | 1.3 | 0.6 | 0.0 | 9.4 |
| 2015-16 | Toyota | 55 | 13 | 20.8 | .478 | .449* | .816 | 1.4 | 1.4 | 0.6 | 0 | 11.2 |
| 2016-17 | A Tokyo | 59 | 6 | 16.8 | .399 | .395 | .939 | 1.4 | 0.4 | 0.2 | 0.1 | 6.1 |
| 2017-18 | Mikawa | 55 | 6 | 12.8 | .440 | .403 | .677 | 0.9 | 0.9 | 0.4 | 0.0 | 4.9 |