| Seiju vs Jin | 4–13 | 23.53% |
| Seiju vs Kazuya | 7–5 | 58.33% |
| Seiju vs Law | 7–2 | 77.78% |
| Seiju vs King | 4–4 | 50.00% |
| Seiju vs Hwoarang | 2–5 | 28.57% |
| Seiju vs Claudio | 3–4 | 42.86% |
| Seiju vs Heihachi | 3–4 | 42.86% |
| Seiju vs Steve | 2–3 | 40.00% |
| Seiju vs Lili | 4–1 | 80.00% |
| Seiju vs Reina | 5–0 | 100.00% |
| Seiju vs Devil Jin | 4–0 | 100.00% |
| Seiju vs Leo | 2–2 | 50.00% |
| Seiju vs Victor | 4–0 | 100.00% |
| Seiju vs Xiaoyu | 2–1 | 66.67% |
| Seiju vs Asuka | 2–1 | 66.67% |
| Seiju vs Nina | 2–1 | 66.67% |
| Seiju vs Zafina | 2–1 | 66.67% |
| Seiju vs Yoshimitsu | 2–0 | 100.00% |
| Seiju vs Bryan | 0–2 | 0.00% |
| Seiju vs Jack-8 | 0–2 | 0.00% |
| Seiju vs Dragunov | 2–0 | 100.00% |
| Seiju vs Lars | 2–0 | 100.00% |
| Seiju vs Kuma | 0–2 | 0.00% |
| Seiju vs Jun | 0–2 | 0.00% |
| Seiju vs Eddy | 2–0 | 100.00% |
| Seiju vs Anna | 1–1 | 50.00% |
| Seiju vs Fahkumram | 0–2 | 0.00% |
| Seiju vs Alisa | 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.