| Kotaro vs Kazuya | 336–230 | 59.36% |
| Kotaro vs Jin | 218–156 | 58.29% |
| Kotaro vs Bryan | 209–154 | 57.58% |
| Kotaro vs Heihachi | 160–117 | 57.76% |
| Kotaro vs Paul | 164–111 | 59.64% |
| Kotaro vs Hwoarang | 141–115 | 55.08% |
| Kotaro vs King | 149–104 | 58.89% |
| Kotaro vs Reina | 148–102–1 | 59.20% |
| Kotaro vs Dragunov | 124–98 | 55.86% |
| Kotaro vs Devil Jin | 123–96 | 56.16% |
| Kotaro vs Law | 132–61 | 68.39% |
| Kotaro vs Steve | 114–77 | 59.69% |
| Kotaro vs Clive | 100–67 | 59.88% |
| Kotaro vs Fahkumram | 98–65 | 60.12% |
| Kotaro vs Lee | 79–78 | 50.32% |
| Kotaro vs Eddy | 98–52 | 65.33% |
| Kotaro vs Feng | 93–54 | 63.27% |
| Kotaro vs Lili | 85–60 | 58.62% |
| Kotaro vs Yoshimitsu | 94–46 | 67.14% |
| Kotaro vs Asuka | 81–59 | 57.86% |
| Kotaro vs Victor | 71–47 | 60.17% |
| Kotaro vs Xiaoyu | 69–48 | 58.97% |
| Kotaro vs Lidia | 59–57 | 50.86% |
| Kotaro vs Jun | 72–42 | 63.16% |
| Kotaro vs Claudio | 62–48 | 56.36% |
| Kotaro vs Leroy | 74–34 | 68.52% |
| Kotaro vs Lars | 49–54 | 47.57% |
| Kotaro vs Nina | 61–40 | 60.40% |
| Kotaro vs Azucena | 59–36 | 62.11% |
| Kotaro vs Jack-8 | 50–39 | 56.18% |
| Kotaro vs Armor King | 56–33 | 62.92% |
| Kotaro vs Raven | 43–31 | 58.11% |
| Kotaro vs Leo | 34–31 | 52.31% |
| Kotaro vs Alisa | 49–16 | 75.38% |
| Kotaro vs Kuma | 32–30 | 51.61% |
| Kotaro vs Zafina | 32–29 | 52.46% |
| Kotaro vs Shaheen | 30–24 | 55.56% |
| Kotaro vs Anna | 23–17 | 57.50% |
| Kotaro vs Panda | 20–7 | 74.07% |
| Kotaro vs Miary Zo | 8–8 | 50.00% |
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.