| Koji vs King | 57–36 | 61.29% |
| Koji vs Steve | 49–38 | 56.32% |
| Koji vs Jin | 42–35 | 54.55% |
| Koji vs Armor King | 41–34 | 54.67% |
| Koji vs Kazuya | 49–24 | 67.12% |
| Koji vs Heihachi | 37–31 | 54.41% |
| Koji vs Law | 35–30 | 53.85% |
| Koji vs Bryan | 24–34 | 41.38% |
| Koji vs Reina | 34–20 | 62.96% |
| Koji vs Hwoarang | 24–24 | 50.00% |
| Koji vs Dragunov | 28–20 | 58.33% |
| Koji vs Azucena | 15–28 | 34.88% |
| Koji vs Yoshimitsu | 29–12 | 70.73% |
| Koji vs Lee | 19–20 | 48.72% |
| Koji vs Paul | 22–16 | 57.89% |
| Koji vs Asuka | 20–13 | 60.61% |
| Koji vs Lars | 16–16 | 50.00% |
| Koji vs Devil Jin | 19–12 | 61.29% |
| Koji vs Feng | 13–18 | 41.94% |
| Koji vs Victor | 18–10 | 64.29% |
| Koji vs Eddy | 11–17 | 39.29% |
| Koji vs Lili | 18–9 | 66.67% |
| Koji vs Jun | 15–12 | 55.56% |
| Koji vs Xiaoyu | 11–14 | 44.00% |
| Koji vs Leo | 16–9 | 64.00% |
| Koji vs Leroy | 13–12 | 52.00% |
| Koji vs Lidia | 12–11 | 52.17% |
| Koji vs Alisa | 14–8 | 63.64% |
| Koji vs Nina | 12–10 | 54.55% |
| Koji vs Clive | 12–10 | 54.55% |
| Koji vs Miary Zo | 10–7 | 58.82% |
| Koji vs Jack-8 | 6–9 | 40.00% |
| Koji vs Raven | 9–5 | 64.29% |
| Koji vs Fahkumram | 7–7 | 50.00% |
| Koji vs Claudio | 4–6 | 40.00% |
| Koji vs Kuma | 5–5 | 50.00% |
| Koji vs Anna | 5–4 | 55.56% |
| Koji vs Shaheen | 6–2 | 75.00% |
| Koji vs Zafina | 2–4 | 33.33% |
| Koji vs Panda | 2–1 | 66.67% |
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.