Riku Kumagai is tied in the series against
Ken Yukuhiro, 3-3.
| event |
round |
table |
player one |
result |
player two |
| Grand Prix Kitakyushu 2013 | 10 | 37 | Kumagai, Riku (1737) | Won 2-1 | Yukuhiro, Ken (2075) |
| Grand Prix Minneapolis 2018 | 12 | 282 | Kumagai, Riku (2069) | Lost 0-2 | Yukuhiro, Ken (2226) |
| 2020 Grand Finals | 2 | 8 | Kumagai, Riku (2115) | Lost 1-2 | Yukuhiro, Ken (2105) |
| 2020 Grand Finals | 9 | 9 | Kumagai, Riku (2117) | Lost 1-2 | Yukuhiro, Ken (2124) |
| Zendikar Rising Championship | 5 | 40 | Kumagai, Riku (2096) | Won 2-1 | Yukuhiro, Ken (2098) |
| Neon Dynasty Championship | 15 | 52 | Kumagai, Riku (2095) | Won 2-0 | Yukuhiro, Ken (1876) |