| Japiuski vs Eddy | 22–17 | 56.41% |
| Japiuski vs Kazuya | 12–23 | 34.29% |
| Japiuski vs Reina | 14–16 | 46.67% |
| Japiuski vs Dragunov | 11–15 | 42.31% |
| Japiuski vs King | 9–16 | 36.00% |
| Japiuski vs Jin | 13–11 | 54.17% |
| Japiuski vs Lili | 11–13 | 45.83% |
| Japiuski vs Steve | 10–12 | 45.45% |
| Japiuski vs Azucena | 20–2 | 90.91% |
| Japiuski vs Hwoarang | 13–8 | 61.90% |
| Japiuski vs Lidia | 7–12 | 36.84% |
| Japiuski vs Lars | 9–8 | 52.94% |
| Japiuski vs Law | 12–3 | 80.00% |
| Japiuski vs Asuka | 4–11 | 26.67% |
| Japiuski vs Nina | 3–12 | 20.00% |
| Japiuski vs Heihachi | 11–4 | 73.33% |
| Japiuski vs Bryan | 7–4 | 63.64% |
| Japiuski vs Yoshimitsu | 6–2 | 75.00% |
| Japiuski vs Xiaoyu | 4–4 | 50.00% |
| Japiuski vs Alisa | 4–4 | 50.00% |
| Japiuski vs Leroy | 2–6 | 25.00% |
| Japiuski vs Victor | 4–4 | 50.00% |
| Japiuski vs Jun | 2–5 | 28.57% |
| Japiuski vs Raven | 2–5 | 28.57% |
| Japiuski vs Paul | 3–3 | 50.00% |
| Japiuski vs Claudio | 4–1 | 80.00% |
| Japiuski vs Zafina | 2–3 | 40.00% |
| Japiuski vs Jack-8 | 1–2 | 33.33% |
| Japiuski vs Devil Jin | 2–1 | 66.67% |
| Japiuski vs Feng | 1–2 | 33.33% |
| Japiuski vs Leo | 3–0 | 100.00% |
| Japiuski vs Kuma | 0–1 | 0.00% |
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.