| Koyomin vs Reina | 9–3 | 75.00% |
| Koyomin vs Eddy | 6–6 | 50.00% |
| Koyomin vs Jin | 8–3 | 72.73% |
| Koyomin vs Kazuya | 9–1 | 90.00% |
| Koyomin vs Law | 6–2 | 75.00% |
| Koyomin vs Jun | 4–4 | 50.00% |
| Koyomin vs King | 7–0 | 100.00% |
| Koyomin vs Asuka | 6–1 | 85.71% |
| Koyomin vs Kuma | 4–3 | 57.14% |
| Koyomin vs Bryan | 2–4 | 33.33% |
| Koyomin vs Leo | 5–1 | 83.33% |
| Koyomin vs Steve | 3–1 | 75.00% |
| Koyomin vs Feng | 3–1 | 75.00% |
| Koyomin vs Dragunov | 0–4 | 0.00% |
| Koyomin vs Lars | 0–4 | 0.00% |
| Koyomin vs Zafina | 4–0 | 100.00% |
| Koyomin vs Yoshimitsu | 1–2 | 33.33% |
| Koyomin vs Jack-8 | 2–1 | 66.67% |
| Koyomin vs Shaheen | 1–2 | 33.33% |
| Koyomin vs Nina | 2–1 | 66.67% |
| Koyomin vs Lidia | 2–1 | 66.67% |
| Koyomin vs Paul | 2–0 | 100.00% |
| Koyomin vs Hwoarang | 2–0 | 100.00% |
| Koyomin vs Raven | 0–2 | 0.00% |
| Koyomin vs Clive | 2–0 | 100.00% |
| Koyomin vs Devil Jin | 0–1 | 0.00% |
| Koyomin vs Lili | 1–0 | 100.00% |
| Koyomin vs Victor | 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.