| Kouki vs King | 13–16 | 44.83% |
| Kouki vs Steve | 12–11 | 52.17% |
| Kouki vs Azucena | 8–14 | 36.36% |
| Kouki vs Reina | 8–11 | 42.11% |
| Kouki vs Lili | 6–12 | 33.33% |
| Kouki vs Eddy | 4–14 | 22.22% |
| Kouki vs Bryan | 5–12 | 29.41% |
| Kouki vs Jun | 5–11 | 31.25% |
| Kouki vs Kazuya | 9–6 | 60.00% |
| Kouki vs Hwoarang | 4–10 | 28.57% |
| Kouki vs Jin | 5–9 | 35.71% |
| Kouki vs Asuka | 7–7 | 50.00% |
| Kouki vs Lee | 8–6 | 57.14% |
| Kouki vs Feng | 7–5 | 58.33% |
| Kouki vs Law | 2–8 | 20.00% |
| Kouki vs Yoshimitsu | 5–5 | 50.00% |
| Kouki vs Dragunov | 4–6 | 40.00% |
| Kouki vs Lars | 4–6 | 40.00% |
| Kouki vs Nina | 5–5 | 50.00% |
| Kouki vs Victor | 3–7 | 30.00% |
| Kouki vs Lidia | 7–3 | 70.00% |
| Kouki vs Heihachi | 4–5 | 44.44% |
| Kouki vs Claudio | 3–5 | 37.50% |
| Kouki vs Shaheen | 4–4 | 50.00% |
| Kouki vs Jack-8 | 2–5 | 28.57% |
| Kouki vs Kuma | 2–5 | 28.57% |
| Kouki vs Paul | 4–2 | 66.67% |
| Kouki vs Devil Jin | 5–1 | 83.33% |
| Kouki vs Raven | 1–5 | 16.67% |
| Kouki vs Clive | 4–2 | 66.67% |
| Kouki vs Xiaoyu | 1–4 | 20.00% |
| Kouki vs Leroy | 1–4 | 20.00% |
| Kouki vs Leo | 1–3 | 25.00% |
| Kouki vs Alisa | 2–1 | 66.67% |
| Kouki vs Zafina | 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.