| iwashi vs Kazuya | 93–112 | 45.37% |
| iwashi vs Dragunov | 53–110–1 | 32.52% |
| iwashi vs Paul | 62–94 | 39.74% |
| iwashi vs Bryan | 63–93 | 40.38% |
| iwashi vs Reina | 69–83 | 45.39% |
| iwashi vs King | 47–97 | 32.64% |
| iwashi vs Hwoarang | 53–86 | 38.13% |
| iwashi vs Asuka | 55–74 | 42.64% |
| iwashi vs Jin | 51–74 | 40.80% |
| iwashi vs Steve | 55–67 | 45.08% |
| iwashi vs Heihachi | 42–52 | 44.68% |
| iwashi vs Lili | 34–50 | 40.48% |
| iwashi vs Jun | 37–44 | 45.68% |
| iwashi vs Law | 37–39 | 48.68% |
| iwashi vs Clive | 30–43 | 41.10% |
| iwashi vs Yoshimitsu | 27–45 | 37.50% |
| iwashi vs Azucena | 30–32 | 48.39% |
| iwashi vs Xiaoyu | 27–32 | 45.76% |
| iwashi vs Nina | 25–34 | 42.37% |
| iwashi vs Alisa | 21–33 | 38.89% |
| iwashi vs Victor | 20–32 | 38.46% |
| iwashi vs Fahkumram | 17–32 | 34.69% |
| iwashi vs Anna | 12–31 | 27.91% |
| iwashi vs Claudio | 15–27 | 35.71% |
| iwashi vs Leo | 12–29 | 29.27% |
| iwashi vs Devil Jin | 16–24 | 40.00% |
| iwashi vs Lidia | 20–20 | 50.00% |
| iwashi vs Lee | 15–23 | 39.47% |
| iwashi vs Lars | 15–19 | 44.12% |
| iwashi vs Zafina | 13–18 | 41.94% |
| iwashi vs Eddy | 8–23 | 25.81% |
| iwashi vs Feng | 9–19 | 32.14% |
| iwashi vs Shaheen | 9–17 | 34.62% |
| iwashi vs Leroy | 13–12 | 52.00% |
| iwashi vs Jack-8 | 7–16 | 30.43% |
| iwashi vs Kuma | 5–15 | 25.00% |
| iwashi vs Panda | 5–13 | 27.78% |
| iwashi vs Raven | 4–7 | 36.36% |
| iwashi vs Armor King | 1–2 | 33.33% |
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.