| Ioji vs Jin | 27–45 | 37.50% |
| Ioji vs Kazuya | 28–26 | 51.85% |
| Ioji vs King | 20–30 | 40.00% |
| Ioji vs Eddy | 18–32 | 36.00% |
| Ioji vs Hwoarang | 19–25 | 43.18% |
| Ioji vs Reina | 14–17 | 45.16% |
| Ioji vs Jun | 15–14 | 51.72% |
| Ioji vs Lili | 14–14 | 50.00% |
| Ioji vs Steve | 15–10 | 60.00% |
| Ioji vs Law | 5–19 | 20.83% |
| Ioji vs Bryan | 11–13 | 45.83% |
| Ioji vs Yoshimitsu | 14–9 | 60.87% |
| Ioji vs Azucena | 13–10 | 56.52% |
| Ioji vs Feng | 11–10 | 52.38% |
| Ioji vs Dragunov | 7–13 | 35.00% |
| Ioji vs Nina | 9–9 | 50.00% |
| Ioji vs Devil Jin | 11–4 | 73.33% |
| Ioji vs Lars | 7–7 | 50.00% |
| Ioji vs Asuka | 4–9 | 30.77% |
| Ioji vs Claudio | 6–7 | 46.15% |
| Ioji vs Lee | 2–9 | 18.18% |
| Ioji vs Leo | 6–4 | 60.00% |
| Ioji vs Victor | 2–8 | 20.00% |
| Ioji vs Shaheen | 4–5 | 44.44% |
| Ioji vs Paul | 0–8 | 0.00% |
| Ioji vs Alisa | 2–6 | 25.00% |
| Ioji vs Raven | 3–5 | 37.50% |
| Ioji vs Xiaoyu | 2–4 | 33.33% |
| Ioji vs Jack-8 | 3–1 | 75.00% |
| Ioji vs Kuma | 0–4 | 0.00% |
| Ioji vs Zafina | 3–1 | 75.00% |
| Ioji vs Leroy | 0–3 | 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.