| Koyuki vs Bryan | 175–118 | 59.73% |
| Koyuki vs Jin | 177–97 | 64.60% |
| Koyuki vs Kazuya | 166–92 | 64.34% |
| Koyuki vs Steve | 142–93 | 60.43% |
| Koyuki vs Lili | 125–101 | 55.31% |
| Koyuki vs Dragunov | 148–59 | 71.50% |
| Koyuki vs Law | 127–78 | 61.95% |
| Koyuki vs Hwoarang | 130–69 | 65.33% |
| Koyuki vs Shaheen | 123–49 | 71.51% |
| Koyuki vs Lee | 119–48 | 71.26% |
| Koyuki vs Azucena | 116–47 | 71.17% |
| Koyuki vs King | 121–36 | 77.07% |
| Koyuki vs Yoshimitsu | 99–55 | 64.29% |
| Koyuki vs Xiaoyu | 90–60 | 60.00% |
| Koyuki vs Jun | 91–48 | 65.47% |
| Koyuki vs Paul | 96–40 | 70.59% |
| Koyuki vs Devil Jin | 76–55 | 58.02% |
| Koyuki vs Reina | 98–30 | 76.56% |
| Koyuki vs Victor | 86–37 | 69.92% |
| Koyuki vs Heihachi | 68–46 | 59.65% |
| Koyuki vs Alisa | 75–34 | 68.81% |
| Koyuki vs Asuka | 77–30 | 71.96% |
| Koyuki vs Feng | 58–47 | 55.24% |
| Koyuki vs Jack-8 | 66–35 | 65.35% |
| Koyuki vs Claudio | 62–39 | 61.39% |
| Koyuki vs Lars | 59–38–1 | 60.82% |
| Koyuki vs Eddy | 59–37 | 61.46% |
| Koyuki vs Leo | 76–19 | 80.00% |
| Koyuki vs Nina | 53–38 | 58.24% |
| Koyuki vs Leroy | 50–41 | 54.95% |
| Koyuki vs Kuma | 49–16 | 75.38% |
| Koyuki vs Raven | 29–35 | 45.31% |
| Koyuki vs Zafina | 42–21 | 66.67% |
| Koyuki vs Lidia | 35–15 | 70.00% |
| Koyuki vs Panda | 24–10 | 70.59% |
| Koyuki vs Clive | 4–0 | 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.