| Kouichi vs Hwoarang | 230–228 | 50.22% |
| Kouichi vs Kazuya | 214–222 | 49.08% |
| Kouichi vs Dragunov | 196–213 | 47.92% |
| Kouichi vs Bryan | 188–206 | 47.72% |
| Kouichi vs Paul | 183–196 | 48.28% |
| Kouichi vs King | 190–183 | 50.94% |
| Kouichi vs Jin | 122–182 | 40.13% |
| Kouichi vs Reina | 135–164 | 45.15% |
| Kouichi vs Asuka | 140–155 | 47.46% |
| Kouichi vs Steve | 114–126 | 47.50% |
| Kouichi vs Law | 105–129 | 44.87% |
| Kouichi vs Heihachi | 108–124 | 46.55% |
| Kouichi vs Lili | 112–106 | 51.38% |
| Kouichi vs Victor | 126–82 | 60.58% |
| Kouichi vs Devil Jin | 95–104 | 47.74% |
| Kouichi vs Yoshimitsu | 98–90 | 52.13% |
| Kouichi vs Xiaoyu | 94–86 | 52.22% |
| Kouichi vs Lidia | 114–65 | 63.69% |
| Kouichi vs Feng | 62–109 | 36.26% |
| Kouichi vs Azucena | 98–73 | 57.31% |
| Kouichi vs Nina | 73–92 | 44.24% |
| Kouichi vs Leo | 63–95 | 39.87% |
| Kouichi vs Alisa | 67–83 | 44.67% |
| Kouichi vs Jack-8 | 53–96 | 35.57% |
| Kouichi vs Lars | 53–86 | 38.13% |
| Kouichi vs Claudio | 55–83 | 39.86% |
| Kouichi vs Jun | 66–71 | 48.18% |
| Kouichi vs Fahkumram | 65–68 | 48.87% |
| Kouichi vs Leroy | 70–56 | 55.56% |
| Kouichi vs Eddy | 57–65 | 46.72% |
| Kouichi vs Lee | 76–41 | 64.96% |
| Kouichi vs Armor King | 49–55 | 47.12% |
| Kouichi vs Shaheen | 42–48 | 46.67% |
| Kouichi vs Raven | 30–60 | 33.33% |
| Kouichi vs Miary Zo | 46–38 | 54.76% |
| Kouichi vs Kuma | 28–47 | 37.33% |
| Kouichi vs Anna | 31–42 | 42.47% |
| Kouichi vs Clive | 30–37 | 44.78% |
| Kouichi vs Zafina | 19–34 | 35.85% |
| Kouichi vs Panda | 23–21 | 52.27% |
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.