| Iroha vs Kazuya | 169–122 | 58.08% |
| Iroha vs Reina | 129–135 | 48.86% |
| Iroha vs Dragunov | 98–153 | 39.04% |
| Iroha vs Paul | 105–127 | 45.26% |
| Iroha vs King | 81–139 | 36.82% |
| Iroha vs Hwoarang | 93–123 | 43.06% |
| Iroha vs Jin | 83–121 | 40.69% |
| Iroha vs Lili | 92–85 | 51.98% |
| Iroha vs Asuka | 77–94 | 45.03% |
| Iroha vs Bryan | 71–91 | 43.83% |
| Iroha vs Azucena | 47–75 | 38.52% |
| Iroha vs Law | 48–72 | 40.00% |
| Iroha vs Victor | 52–65 | 44.44% |
| Iroha vs Yoshimitsu | 38–62 | 38.00% |
| Iroha vs Jun | 43–55 | 43.88% |
| Iroha vs Xiaoyu | 37–59 | 38.54% |
| Iroha vs Steve | 44–49 | 47.31% |
| Iroha vs Alisa | 29–52 | 35.80% |
| Iroha vs Devil Jin | 34–40 | 45.95% |
| Iroha vs Claudio | 19–50 | 27.54% |
| Iroha vs Leroy | 26–38 | 40.62% |
| Iroha vs Lidia | 26–38 | 40.62% |
| Iroha vs Leo | 24–38 | 38.71% |
| Iroha vs Nina | 24–35 | 40.68% |
| Iroha vs Jack-8 | 20–34 | 37.04% |
| Iroha vs Lee | 18–36 | 33.33% |
| Iroha vs Lars | 24–28 | 46.15% |
| Iroha vs Clive | 29–23 | 55.77% |
| Iroha vs Feng | 19–31 | 38.00% |
| Iroha vs Eddy | 17–29 | 36.96% |
| Iroha vs Kuma | 13–26 | 33.33% |
| Iroha vs Shaheen | 10–28 | 26.32% |
| Iroha vs Zafina | 9–24 | 27.27% |
| Iroha vs Heihachi | 10–22 | 31.25% |
| Iroha vs Raven | 10–18 | 35.71% |
| Iroha vs Panda | 2–12 | 14.29% |
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.