| Koku vs Kazuya | 268–326 | 45.12% |
| Koku vs Dragunov | 257–312–1 | 45.17% |
| Koku vs Bryan | 205–293 | 41.16% |
| Koku vs King | 274–208 | 56.85% |
| Koku vs Hwoarang | 201–255 | 44.08% |
| Koku vs Jin | 211–236 | 47.20% |
| Koku vs Paul | 200–233 | 46.19% |
| Koku vs Asuka | 202–218 | 48.10% |
| Koku vs Reina | 206–213 | 49.16% |
| Koku vs Lili | 192–181 | 51.47% |
| Koku vs Law | 135–174 | 43.69% |
| Koku vs Steve | 136–170 | 44.44% |
| Koku vs Yoshimitsu | 131–174 | 42.95% |
| Koku vs Victor | 152–149 | 50.50% |
| Koku vs Azucena | 157–125 | 55.67% |
| Koku vs Heihachi | 141–138 | 50.54% |
| Koku vs Miary Zo | 106–151 | 41.25% |
| Koku vs Jun | 131–112 | 53.91% |
| Koku vs Devil Jin | 106–110–1 | 49.07% |
| Koku vs Xiaoyu | 103–113 | 47.69% |
| Koku vs Leo | 95–113 | 45.67% |
| Koku vs Lars | 100–106 | 48.54% |
| Koku vs Feng | 85–119 | 41.67% |
| Koku vs Claudio | 89–114 | 43.84% |
| Koku vs Nina | 92–110 | 45.54% |
| Koku vs Eddy | 103–90 | 53.37% |
| Koku vs Lee | 81–110 | 42.41% |
| Koku vs Clive | 70–121 | 36.65% |
| Koku vs Alisa | 67–118 | 36.22% |
| Koku vs Jack-8 | 67–116 | 36.61% |
| Koku vs Armor King | 96–87 | 52.46% |
| Koku vs Leroy | 79–88 | 47.31% |
| Koku vs Fahkumram | 75–87 | 46.30% |
| Koku vs Lidia | 81–73 | 52.60% |
| Koku vs Shaheen | 49–99–1 | 33.11% |
| Koku vs Raven | 57–74 | 43.51% |
| Koku vs Zafina | 48–60 | 44.44% |
| Koku vs Anna | 48–58 | 45.28% |
| Koku vs Kuma | 37–43 | 46.25% |
| Koku vs Panda | 34–36 | 48.57% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.