| Seihachi vs Bryan | 0–8 | 0.00% |
| Seihachi vs Lee | 0–8 | 0.00% |
| Seihachi vs Reina | 4–4 | 50.00% |
| Seihachi vs Victor | 4–4 | 50.00% |
| Seihachi vs Jin | 1–6 | 14.29% |
| Seihachi vs Kazuya | 0–7 | 0.00% |
| Seihachi vs Leroy | 2–5 | 28.57% |
| Seihachi vs Azucena | 4–3 | 57.14% |
| Seihachi vs Paul | 2–4 | 33.33% |
| Seihachi vs Law | 0–6 | 0.00% |
| Seihachi vs Steve | 3–2 | 60.00% |
| Seihachi vs Asuka | 3–2 | 60.00% |
| Seihachi vs Lili | 1–4 | 20.00% |
| Seihachi vs Claudio | 0–5 | 0.00% |
| Seihachi vs Hwoarang | 2–1 | 66.67% |
| Seihachi vs Dragunov | 0–3 | 0.00% |
| Seihachi vs Clive | 1–2 | 33.33% |
| Seihachi vs King | 1–1 | 50.00% |
| Seihachi vs Yoshimitsu | 0–2 | 0.00% |
| Seihachi vs Xiaoyu | 0–2 | 0.00% |
| Seihachi vs Leo | 2–0 | 100.00% |
| Seihachi vs Lars | 0–2 | 0.00% |
| Seihachi vs Alisa | 0–2 | 0.00% |
| Seihachi vs Nina | 0–2 | 0.00% |
| Seihachi vs Armor King | 1–1 | 50.00% |
| Seihachi vs Miary Zo | 2–0 | 100.00% |
| Seihachi vs Devil Jin | 0–1 | 0.00% |
| Seihachi vs Feng | 0–1 | 0.00% |
| Seihachi vs Jun | 1–0 | 100.00% |
| Seihachi vs Eddy | 0–1 | 0.00% |
| Seihachi vs Anna | 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.