| Kosei88 vs Law | 7–17 | 29.17% |
| Kosei88 vs Hwoarang | 9–12 | 42.86% |
| Kosei88 vs Eddy | 10–10 | 50.00% |
| Kosei88 vs Jin | 11–8 | 57.89% |
| Kosei88 vs King | 5–8 | 38.46% |
| Kosei88 vs Nina | 3–10 | 23.08% |
| Kosei88 vs Steve | 10–2 | 83.33% |
| Kosei88 vs Kazuya | 2–9 | 18.18% |
| Kosei88 vs Lili | 6–4 | 60.00% |
| Kosei88 vs Victor | 6–4 | 60.00% |
| Kosei88 vs Leo | 3–6 | 33.33% |
| Kosei88 vs Azucena | 7–2 | 77.78% |
| Kosei88 vs Xiaoyu | 2–6 | 25.00% |
| Kosei88 vs Lars | 2–6 | 25.00% |
| Kosei88 vs Bryan | 4–3 | 57.14% |
| Kosei88 vs Devil Jin | 2–5 | 28.57% |
| Kosei88 vs Feng | 7–0 | 100.00% |
| Kosei88 vs Dragunov | 3–4 | 42.86% |
| Kosei88 vs Yoshimitsu | 4–2 | 66.67% |
| Kosei88 vs Alisa | 4–2 | 66.67% |
| Kosei88 vs Lee | 4–2 | 66.67% |
| Kosei88 vs Paul | 2–3 | 40.00% |
| Kosei88 vs Asuka | 1–4 | 20.00% |
| Kosei88 vs Claudio | 2–2 | 50.00% |
| Kosei88 vs Jun | 1–3 | 25.00% |
| Kosei88 vs Reina | 4–0 | 100.00% |
| Kosei88 vs Kuma | 1–2 | 33.33% |
| Kosei88 vs Jack-8 | 0–1 | 0.00% |
| Kosei88 vs Panda | 0–1 | 0.00% |
| Kosei88 vs Raven | 0–1 | 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.