| Ishiya vs Kazuya | 9–5 | 64.29% |
| Ishiya vs Steve | 4–10 | 28.57% |
| Ishiya vs Hwoarang | 4–8 | 33.33% |
| Ishiya vs Jin | 5–5 | 50.00% |
| Ishiya vs King | 2–7 | 22.22% |
| Ishiya vs Yoshimitsu | 6–3 | 66.67% |
| Ishiya vs Asuka | 4–5 | 44.44% |
| Ishiya vs Heihachi | 3–6 | 33.33% |
| Ishiya vs Bryan | 5–3 | 62.50% |
| Ishiya vs Lili | 6–2 | 75.00% |
| Ishiya vs Clive | 4–4 | 50.00% |
| Ishiya vs Armor King | 4–4 | 50.00% |
| Ishiya vs Victor | 5–2 | 71.43% |
| Ishiya vs Xiaoyu | 4–2 | 66.67% |
| Ishiya vs Dragunov | 3–3 | 50.00% |
| Ishiya vs Eddy | 4–2 | 66.67% |
| Ishiya vs Anna | 4–2 | 66.67% |
| Ishiya vs Law | 4–1 | 80.00% |
| Ishiya vs Alisa | 2–1 | 66.67% |
| Ishiya vs Jun | 3–0 | 100.00% |
| Ishiya vs Paul | 1–1 | 50.00% |
| Ishiya vs Lars | 2–0 | 100.00% |
| Ishiya vs Shaheen | 2–0 | 100.00% |
| Ishiya vs Lee | 2–0 | 100.00% |
| Ishiya vs Azucena | 0–2 | 0.00% |
| Ishiya vs Lidia | 2–0 | 100.00% |
| Ishiya vs Miary Zo | 1–1 | 50.00% |
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.