| J-Ka1 vs King | 3–6 | 33.33% |
| J-Ka1 vs Law | 2–3 | 40.00% |
| J-Ka1 vs Kazuya | 3–2 | 60.00% |
| J-Ka1 vs Dragunov | 3–2 | 60.00% |
| J-Ka1 vs Lars | 1–4 | 20.00% |
| J-Ka1 vs Claudio | 2–3 | 40.00% |
| J-Ka1 vs Steve | 1–3 | 25.00% |
| J-Ka1 vs Lili | 2–2 | 50.00% |
| J-Ka1 vs Yoshimitsu | 0–3 | 0.00% |
| J-Ka1 vs Azucena | 1–2 | 33.33% |
| J-Ka1 vs Miary Zo | 2–1 | 66.67% |
| J-Ka1 vs Alisa | 0–2 | 0.00% |
| J-Ka1 vs Kuma | 0–2 | 0.00% |
| J-Ka1 vs Leroy | 0–2 | 0.00% |
| J-Ka1 vs Victor | 1–1 | 50.00% |
| J-Ka1 vs Eddy | 2–0 | 100.00% |
| J-Ka1 vs Hwoarang | 0–1 | 0.00% |
| J-Ka1 vs Bryan | 1–0 | 100.00% |
| J-Ka1 vs Devil Jin | 0–1 | 0.00% |
| J-Ka1 vs Nina | 0–1 | 0.00% |
| J-Ka1 vs Jun | 0–1 | 0.00% |
| J-Ka1 vs Reina | 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.