| Kotaro vs King | 23–21 | 52.27% |
| Kotaro vs Jin | 17–23 | 42.50% |
| Kotaro vs Paul | 14–23 | 37.84% |
| Kotaro vs Victor | 7–25 | 21.88% |
| Kotaro vs Dragunov | 15–13 | 53.57% |
| Kotaro vs Law | 8–19 | 29.63% |
| Kotaro vs Lili | 15–10 | 60.00% |
| Kotaro vs Reina | 9–16 | 36.00% |
| Kotaro vs Azucena | 14–11 | 56.00% |
| Kotaro vs Hwoarang | 12–12 | 50.00% |
| Kotaro vs Steve | 16–8 | 66.67% |
| Kotaro vs Eddy | 6–17 | 26.09% |
| Kotaro vs Bryan | 6–13 | 31.58% |
| Kotaro vs Lars | 7–7 | 50.00% |
| Kotaro vs Kazuya | 4–7 | 36.36% |
| Kotaro vs Yoshimitsu | 3–7 | 30.00% |
| Kotaro vs Kuma | 1–8 | 11.11% |
| Kotaro vs Heihachi | 2–7 | 22.22% |
| Kotaro vs Asuka | 5–3 | 62.50% |
| Kotaro vs Xiaoyu | 5–2 | 71.43% |
| Kotaro vs Jack-8 | 2–5 | 28.57% |
| Kotaro vs Jun | 3–4 | 42.86% |
| Kotaro vs Claudio | 2–4 | 33.33% |
| Kotaro vs Nina | 2–4 | 33.33% |
| Kotaro vs Devil Jin | 3–2 | 60.00% |
| Kotaro vs Alisa | 2–3 | 40.00% |
| Kotaro vs Feng | 1–3 | 25.00% |
| Kotaro vs Zafina | 2–1 | 66.67% |
| Kotaro vs Leroy | 2–1 | 66.67% |
| Kotaro vs Raven | 1–2 | 33.33% |
| Kotaro vs Clive | 2–1 | 66.67% |
| Kotaro vs Leo | 2–0 | 100.00% |
| Kotaro vs Shaheen | 0–2 | 0.00% |
| Kotaro vs Lee | 1–0 | 100.00% |
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.