| Seishirou vs Jin | 40–32 | 55.56% |
| Seishirou vs Hwoarang | 27–29 | 48.21% |
| Seishirou vs Reina | 37–17 | 68.52% |
| Seishirou vs Kazuya | 28–23 | 54.90% |
| Seishirou vs Jun | 27–21 | 56.25% |
| Seishirou vs Dragunov | 26–18 | 59.09% |
| Seishirou vs Lili | 25–15 | 62.50% |
| Seishirou vs Bryan | 15–24 | 38.46% |
| Seishirou vs Heihachi | 26–9 | 74.29% |
| Seishirou vs Law | 18–16 | 52.94% |
| Seishirou vs King | 17–17 | 50.00% |
| Seishirou vs Yoshimitsu | 17–16 | 51.52% |
| Seishirou vs Paul | 12–20 | 37.50% |
| Seishirou vs Lars | 23–8 | 74.19% |
| Seishirou vs Steve | 9–18 | 33.33% |
| Seishirou vs Asuka | 16–10 | 61.54% |
| Seishirou vs Devil Jin | 17–9 | 65.38% |
| Seishirou vs Victor | 14–12 | 53.85% |
| Seishirou vs Jack-8 | 8–15 | 34.78% |
| Seishirou vs Feng | 10–13 | 43.48% |
| Seishirou vs Lee | 8–15 | 34.78% |
| Seishirou vs Lidia | 11–12 | 47.83% |
| Seishirou vs Shaheen | 9–7 | 56.25% |
| Seishirou vs Azucena | 3–13 | 18.75% |
| Seishirou vs Xiaoyu | 10–5 | 66.67% |
| Seishirou vs Alisa | 8–7 | 53.33% |
| Seishirou vs Leroy | 7–8 | 46.67% |
| Seishirou vs Claudio | 11–3 | 78.57% |
| Seishirou vs Anna | 1–12 | 7.69% |
| Seishirou vs Raven | 5–6 | 45.45% |
| Seishirou vs Leo | 9–1 | 90.00% |
| Seishirou vs Nina | 7–2 | 77.78% |
| Seishirou vs Eddy | 4–5 | 44.44% |
| Seishirou vs Clive | 7–2 | 77.78% |
| Seishirou vs Kuma | 2–4 | 33.33% |
| Seishirou vs Zafina | 1–3 | 25.00% |
| Seishirou vs Fahkumram | 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.