| Koji vs Jin | 37–16 | 69.81% |
| Koji vs Kazuya | 37–12–1 | 75.51% |
| Koji vs Heihachi | 30–16 | 65.22% |
| Koji vs Reina | 41–4 | 91.11% |
| Koji vs Bryan | 25–14 | 64.10% |
| Koji vs Dragunov | 25–13 | 65.79% |
| Koji vs Lee | 21–14 | 60.00% |
| Koji vs Hwoarang | 27–3 | 90.00% |
| Koji vs Law | 22–6 | 78.57% |
| Koji vs Steve | 19–6 | 76.00% |
| Koji vs King | 16–8 | 66.67% |
| Koji vs Paul | 16–7 | 69.57% |
| Koji vs Yoshimitsu | 14–9 | 60.87% |
| Koji vs Azucena | 15–7 | 68.18% |
| Koji vs Xiaoyu | 12–5 | 70.59% |
| Koji vs Lili | 15–1 | 93.75% |
| Koji vs Alisa | 10–6 | 62.50% |
| Koji vs Lidia | 14–0 | 100.00% |
| Koji vs Nina | 5–8 | 38.46% |
| Koji vs Jack-8 | 9–3 | 75.00% |
| Koji vs Lars | 9–3 | 75.00% |
| Koji vs Jun | 10–2 | 83.33% |
| Koji vs Leo | 6–5 | 54.55% |
| Koji vs Victor | 11–0 | 100.00% |
| Koji vs Eddy | 8–3 | 72.73% |
| Koji vs Devil Jin | 8–2 | 80.00% |
| Koji vs Raven | 8–2 | 80.00% |
| Koji vs Leroy | 7–0 | 100.00% |
| Koji vs Kuma | 3–2 | 60.00% |
| Koji vs Zafina | 4–0 | 100.00% |
| Koji vs Claudio | 1–2 | 33.33% |
| Koji vs Shaheen | 3–0 | 100.00% |
| Koji vs Asuka | 2–0 | 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.