So Yokoku
So Yokoku is a professional Go player.
Biography
So became a professional in 1994. He was originally from China, and moved to Japan in 1991.| Rank | Year | Notes |
| 1 dan | 1994 | Became pro |
| 2 dan | 1994 | |
| 3 dan | 1995 | |
| 4 dan | 1996 | |
| 5 dan | 1997 | |
| 6 dan | 1999 | |
| 7 dan | 2001 | reached 300th career wins in 2003 |
| 8 dan | 2005 | reached 400th career wins in 2006 |
| 9 dan | 2014 |