| Kotaro vs Kazuya | 194–193 | 50.13% |
| Kotaro vs Jin | 167–133 | 55.67% |
| Kotaro vs Bryan | 152–131 | 53.71% |
| Kotaro vs King | 121–141 | 46.18% |
| Kotaro vs Heihachi | 89–92 | 49.17% |
| Kotaro vs Dragunov | 89–82–1 | 52.05% |
| Kotaro vs Steve | 79–88 | 47.31% |
| Kotaro vs Hwoarang | 65–93 | 41.14% |
| Kotaro vs Law | 65–78 | 45.45% |
| Kotaro vs Lee | 74–65 | 53.24% |
| Kotaro vs Paul | 55–65 | 45.83% |
| Kotaro vs Devil Jin | 43–74 | 36.75% |
| Kotaro vs Yoshimitsu | 57–59 | 49.14% |
| Kotaro vs Reina | 45–63 | 41.67% |
| Kotaro vs Lili | 51–50 | 50.50% |
| Kotaro vs Lars | 29–42 | 40.85% |
| Kotaro vs Victor | 25–46 | 35.21% |
| Kotaro vs Jack-8 | 23–44 | 34.33% |
| Kotaro vs Asuka | 24–42 | 36.36% |
| Kotaro vs Nina | 30–36 | 45.45% |
| Kotaro vs Jun | 31–35 | 46.97% |
| Kotaro vs Feng | 28–31 | 47.46% |
| Kotaro vs Azucena | 30–28 | 51.72% |
| Kotaro vs Leo | 23–32 | 41.82% |
| Kotaro vs Eddy | 22–33 | 40.00% |
| Kotaro vs Anna | 26–25 | 50.98% |
| Kotaro vs Claudio | 23–27 | 46.00% |
| Kotaro vs Leroy | 21–29 | 42.00% |
| Kotaro vs Alisa | 14–33 | 29.79% |
| Kotaro vs Xiaoyu | 20–22 | 47.62% |
| Kotaro vs Clive | 17–24 | 41.46% |
| Kotaro vs Shaheen | 13–17 | 43.33% |
| Kotaro vs Armor King | 5–21 | 19.23% |
| Kotaro vs Lidia | 7–18 | 28.00% |
| Kotaro vs Raven | 6–17 | 26.09% |
| Kotaro vs Kuma | 7–13 | 35.00% |
| Kotaro vs Fahkumram | 10–7 | 58.82% |
| Kotaro vs Miary Zo | 7–4 | 63.64% |
| Kotaro vs Zafina | 3–6 | 33.33% |
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.