| Keiichi vs King | 18–5 | 78.26% |
| Keiichi vs Law | 14–7 | 66.67% |
| Keiichi vs Jin | 7–7 | 50.00% |
| Keiichi vs Clive | 10–1 | 90.91% |
| Keiichi vs Hwoarang | 8–2 | 80.00% |
| Keiichi vs Kazuya | 6–4 | 60.00% |
| Keiichi vs Lili | 5–5 | 50.00% |
| Keiichi vs Alisa | 5–5 | 50.00% |
| Keiichi vs Bryan | 8–1 | 88.89% |
| Keiichi vs Reina | 6–2 | 75.00% |
| Keiichi vs Steve | 3–4 | 42.86% |
| Keiichi vs Jun | 4–3 | 57.14% |
| Keiichi vs Eddy | 4–3 | 57.14% |
| Keiichi vs Devil Jin | 4–2 | 66.67% |
| Keiichi vs Nina | 4–2 | 66.67% |
| Keiichi vs Azucena | 6–0 | 100.00% |
| Keiichi vs Raven | 0–6 | 0.00% |
| Keiichi vs Yoshimitsu | 4–1 | 80.00% |
| Keiichi vs Dragunov | 4–1 | 80.00% |
| Keiichi vs Victor | 3–2 | 60.00% |
| Keiichi vs Leo | 1–3 | 25.00% |
| Keiichi vs Leroy | 4–0 | 100.00% |
| Keiichi vs Paul | 2–1 | 66.67% |
| Keiichi vs Feng | 1–2 | 33.33% |
| Keiichi vs Shaheen | 2–1 | 66.67% |
| Keiichi vs Jack-8 | 2–0 | 100.00% |
| Keiichi vs Lars | 0–2 | 0.00% |
| Keiichi vs Panda | 0–2 | 0.00% |
| Keiichi vs Zafina | 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.