| Koichi vs Steve | 8–1 | 88.89% |
| Koichi vs Nina | 2–6 | 25.00% |
| Koichi vs Fahkumram | 4–3 | 57.14% |
| Koichi vs Lili | 4–2 | 66.67% |
| Koichi vs Reina | 3–2 | 60.00% |
| Koichi vs King | 0–4 | 0.00% |
| Koichi vs Yoshimitsu | 3–1 | 75.00% |
| Koichi vs Hwoarang | 1–3 | 25.00% |
| Koichi vs Azucena | 4–0 | 100.00% |
| Koichi vs Anna | 2–2 | 50.00% |
| Koichi vs Bryan | 0–3 | 0.00% |
| Koichi vs Armor King | 3–0 | 100.00% |
| Koichi vs Paul | 2–0 | 100.00% |
| Koichi vs Law | 2–0 | 100.00% |
| Koichi vs Asuka | 2–0 | 100.00% |
| Koichi vs Devil Jin | 2–0 | 100.00% |
| Koichi vs Leroy | 1–1 | 50.00% |
| Koichi vs Victor | 1–1 | 50.00% |
| Koichi vs Lidia | 0–2 | 0.00% |
| Koichi vs Heihachi | 2–0 | 100.00% |
| Koichi vs Jin | 1–0 | 100.00% |
| Koichi vs Lars | 1–0 | 100.00% |
| Koichi vs Shaheen | 1–0 | 100.00% |
| Koichi vs Clive | 1–0 | 100.00% |
| Koichi vs Miary Zo | 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.