| Kosu vs Jin | 26–15 | 63.41% |
| Kosu vs Devil Jin | 26–15 | 63.41% |
| Kosu vs King | 23–13 | 63.89% |
| Kosu vs Kazuya | 23–13 | 63.89% |
| Kosu vs Clive | 22–11 | 66.67% |
| Kosu vs Asuka | 24–5 | 82.76% |
| Kosu vs Reina | 21–7 | 75.00% |
| Kosu vs Jun | 14–13 | 51.85% |
| Kosu vs Hwoarang | 20–6 | 76.92% |
| Kosu vs Steve | 16–10 | 61.54% |
| Kosu vs Dragunov | 13–13 | 50.00% |
| Kosu vs Lee | 12–8 | 60.00% |
| Kosu vs Lili | 11–8 | 57.89% |
| Kosu vs Feng | 13–5 | 72.22% |
| Kosu vs Bryan | 11–6 | 64.71% |
| Kosu vs Law | 13–3 | 81.25% |
| Kosu vs Yoshimitsu | 9–7 | 56.25% |
| Kosu vs Zafina | 7–9 | 43.75% |
| Kosu vs Lars | 7–7 | 50.00% |
| Kosu vs Xiaoyu | 11–2 | 84.62% |
| Kosu vs Azucena | 7–3 | 70.00% |
| Kosu vs Jack-8 | 3–6 | 33.33% |
| Kosu vs Kuma | 2–7 | 22.22% |
| Kosu vs Leo | 5–3 | 62.50% |
| Kosu vs Heihachi | 6–2 | 75.00% |
| Kosu vs Alisa | 6–1 | 85.71% |
| Kosu vs Claudio | 5–2 | 71.43% |
| Kosu vs Nina | 2–5 | 28.57% |
| Kosu vs Eddy | 1–6 | 14.29% |
| Kosu vs Lidia | 3–4 | 42.86% |
| Kosu vs Victor | 5–0 | 100.00% |
| Kosu vs Leroy | 3–1 | 75.00% |
| Kosu vs Paul | 2–1 | 66.67% |
| Kosu vs Shaheen | 2–0 | 100.00% |
| Kosu vs Panda | 0–2 | 0.00% |
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.