| Koyomin vs Kazuya | 43–44 | 49.43% |
| Koyomin vs King | 36–33 | 52.17% |
| Koyomin vs Heihachi | 41–22 | 65.08% |
| Koyomin vs Reina | 32–29 | 52.46% |
| Koyomin vs Yoshimitsu | 29–29 | 50.00% |
| Koyomin vs Bryan | 31–27 | 53.45% |
| Koyomin vs Jin | 31–22 | 58.49% |
| Koyomin vs Fahkumram | 30–22 | 57.69% |
| Koyomin vs Paul | 32–19 | 62.75% |
| Koyomin vs Steve | 24–21 | 53.33% |
| Koyomin vs Lee | 18–27 | 40.00% |
| Koyomin vs Dragunov | 16–24 | 40.00% |
| Koyomin vs Eddy | 22–18 | 55.00% |
| Koyomin vs Hwoarang | 15–24 | 38.46% |
| Koyomin vs Asuka | 23–8–1 | 74.19% |
| Koyomin vs Lars | 14–16 | 46.67% |
| Koyomin vs Law | 16–13 | 55.17% |
| Koyomin vs Lili | 17–12 | 58.62% |
| Koyomin vs Devil Jin | 15–12 | 55.56% |
| Koyomin vs Leo | 17–10 | 62.96% |
| Koyomin vs Jun | 13–14 | 48.15% |
| Koyomin vs Kuma | 15–11 | 57.69% |
| Koyomin vs Lidia | 13–13 | 50.00% |
| Koyomin vs Anna | 11–11 | 50.00% |
| Koyomin vs Victor | 10–10 | 50.00% |
| Koyomin vs Clive | 15–4 | 78.95% |
| Koyomin vs Jack-8 | 11–7 | 61.11% |
| Koyomin vs Azucena | 5–12 | 29.41% |
| Koyomin vs Raven | 5–11 | 31.25% |
| Koyomin vs Shaheen | 8–6 | 57.14% |
| Koyomin vs Nina | 2–12 | 14.29% |
| Koyomin vs Leroy | 9–4 | 69.23% |
| Koyomin vs Claudio | 6–6 | 50.00% |
| Koyomin vs Alisa | 7–4 | 63.64% |
| Koyomin vs Feng | 3–7 | 30.00% |
| Koyomin vs Zafina | 5–2 | 71.43% |
| Koyomin vs Xiaoyu | 3–3 | 50.00% |
| Koyomin vs Panda | 2–3 | 40.00% |
| Koyomin vs Armor King | 3–1 | 75.00% |
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.