| Kotaro vs Eddy | 14–12 | 53.85% |
| Kotaro vs Reina | 8–5 | 61.54% |
| Kotaro vs King | 10–2 | 83.33% |
| Kotaro vs Hwoarang | 5–1 | 83.33% |
| Kotaro vs Azucena | 4–2 | 66.67% |
| Kotaro vs Bryan | 4–1 | 80.00% |
| Kotaro vs Asuka | 5–0 | 100.00% |
| Kotaro vs Dragunov | 1–4 | 20.00% |
| Kotaro vs Victor | 5–0 | 100.00% |
| Kotaro vs Lidia | 4–1 | 80.00% |
| Kotaro vs Yoshimitsu | 4–0 | 100.00% |
| Kotaro vs Xiaoyu | 0–4 | 0.00% |
| Kotaro vs Shaheen | 2–2 | 50.00% |
| Kotaro vs Lee | 4–0 | 100.00% |
| Kotaro vs Law | 2–1 | 66.67% |
| Kotaro vs Jin | 3–0 | 100.00% |
| Kotaro vs Lars | 0–3 | 0.00% |
| Kotaro vs Kazuya | 2–0 | 100.00% |
| Kotaro vs Lili | 0–2 | 0.00% |
| Kotaro vs Leo | 0–2 | 0.00% |
| Kotaro vs Claudio | 2–0 | 100.00% |
| Kotaro vs Jun | 2–0 | 100.00% |
| Kotaro vs Steve | 0–1 | 0.00% |
| Kotaro vs Raven | 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.