| IRIWA vs King | 8–13 | 38.10% |
| IRIWA vs Reina | 10–11 | 47.62% |
| IRIWA vs Paul | 4–15 | 21.05% |
| IRIWA vs Victor | 8–10 | 44.44% |
| IRIWA vs Hwoarang | 7–10 | 41.18% |
| IRIWA vs Asuka | 7–10 | 41.18% |
| IRIWA vs Dragunov | 8–8 | 50.00% |
| IRIWA vs Eddy | 10–6 | 62.50% |
| IRIWA vs Jun | 6–7 | 46.15% |
| IRIWA vs Steve | 5–6 | 45.45% |
| IRIWA vs Jin | 2–8 | 20.00% |
| IRIWA vs Kazuya | 3–6 | 33.33% |
| IRIWA vs Azucena | 6–3 | 66.67% |
| IRIWA vs Nina | 5–3 | 62.50% |
| IRIWA vs Bryan | 0–7 | 0.00% |
| IRIWA vs Devil Jin | 3–4 | 42.86% |
| IRIWA vs Lars | 3–4 | 42.86% |
| IRIWA vs Claudio | 2–5 | 28.57% |
| IRIWA vs Yoshimitsu | 1–5 | 16.67% |
| IRIWA vs Lili | 4–2 | 66.67% |
| IRIWA vs Alisa | 0–6 | 0.00% |
| IRIWA vs Law | 2–3 | 40.00% |
| IRIWA vs Feng | 0–4 | 0.00% |
| IRIWA vs Leo | 0–4 | 0.00% |
| IRIWA vs Kuma | 2–2 | 50.00% |
| IRIWA vs Panda | 2–2 | 50.00% |
| IRIWA vs Jack-8 | 2–1 | 66.67% |
| IRIWA vs Zafina | 2–1 | 66.67% |
| IRIWA vs Leroy | 3–0 | 100.00% |
| IRIWA vs Xiaoyu | 0–2 | 0.00% |
| IRIWA vs Raven | 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.