| Koji vs Jun | 5–3 | 62.50% |
| Koji vs Steve | 5–2 | 71.43% |
| Koji vs Hwoarang | 2–4 | 33.33% |
| Koji vs Asuka | 5–1 | 83.33% |
| Koji vs Lili | 2–4 | 33.33% |
| Koji vs Dragunov | 2–4 | 33.33% |
| Koji vs Eddy | 4–1 | 80.00% |
| Koji vs Heihachi | 1–4 | 20.00% |
| Koji vs Law | 1–3 | 25.00% |
| Koji vs Paul | 0–3 | 0.00% |
| Koji vs Jin | 1–2 | 33.33% |
| Koji vs Claudio | 2–1 | 66.67% |
| Koji vs Reina | 2–1 | 66.67% |
| Koji vs Miary Zo | 2–1 | 66.67% |
| Koji vs King | 0–2 | 0.00% |
| Koji vs Yoshimitsu | 0–2 | 0.00% |
| Koji vs Kazuya | 2–0 | 100.00% |
| Koji vs Zafina | 1–1 | 50.00% |
| Koji vs Victor | 2–0 | 100.00% |
| Koji vs Xiaoyu | 1–0 | 100.00% |
| Koji vs Devil Jin | 0–1 | 0.00% |
| Koji vs Nina | 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.