| Koshaku vs King | 22–22 | 50.00% |
| Koshaku vs Kazuya | 29–15 | 65.91% |
| Koshaku vs Jin | 23–18 | 56.10% |
| Koshaku vs Reina | 18–19 | 48.65% |
| Koshaku vs Eddy | 17–15 | 53.12% |
| Koshaku vs Lili | 18–12 | 60.00% |
| Koshaku vs Bryan | 21–7 | 75.00% |
| Koshaku vs Azucena | 13–11 | 54.17% |
| Koshaku vs Dragunov | 12–10 | 54.55% |
| Koshaku vs Paul | 8–13 | 38.10% |
| Koshaku vs Hwoarang | 12–9 | 57.14% |
| Koshaku vs Asuka | 11–10 | 52.38% |
| Koshaku vs Nina | 6–13 | 31.58% |
| Koshaku vs Steve | 13–5 | 72.22% |
| Koshaku vs Lars | 14–4 | 77.78% |
| Koshaku vs Xiaoyu | 8–8 | 50.00% |
| Koshaku vs Jun | 11–5 | 68.75% |
| Koshaku vs Law | 5–10 | 33.33% |
| Koshaku vs Feng | 10–5 | 66.67% |
| Koshaku vs Yoshimitsu | 6–6 | 50.00% |
| Koshaku vs Lee | 10–2 | 83.33% |
| Koshaku vs Leroy | 2–10 | 16.67% |
| Koshaku vs Victor | 3–9 | 25.00% |
| Koshaku vs Devil Jin | 4–7 | 36.36% |
| Koshaku vs Alisa | 4–7 | 36.36% |
| Koshaku vs Kuma | 2–8 | 20.00% |
| Koshaku vs Jack-8 | 5–4 | 55.56% |
| Koshaku vs Zafina | 2–6 | 25.00% |
| Koshaku vs Raven | 4–4 | 50.00% |
| Koshaku vs Claudio | 4–2 | 66.67% |
| Koshaku vs Shaheen | 3–2 | 60.00% |
| Koshaku vs Panda | 2–2 | 50.00% |
| Koshaku vs Heihachi | 2–0 | 100.00% |
| Koshaku vs Leo | 1–0 | 100.00% |
| Koshaku vs Lidia | 1–0 | 100.00% |
| Koshaku vs Anna | 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.