| Mr. Iwashi vs Jin | 12–2 | 85.71% |
| Mr. Iwashi vs Hwoarang | 6–2 | 75.00% |
| Mr. Iwashi vs Bryan | 4–4 | 50.00% |
| Mr. Iwashi vs Lili | 6–2 | 75.00% |
| Mr. Iwashi vs Xiaoyu | 2–5 | 28.57% |
| Mr. Iwashi vs Dragunov | 6–1 | 85.71% |
| Mr. Iwashi vs Lee | 5–2 | 71.43% |
| Mr. Iwashi vs Reina | 6–1 | 85.71% |
| Mr. Iwashi vs Victor | 4–2 | 66.67% |
| Mr. Iwashi vs Steve | 5–0 | 100.00% |
| Mr. Iwashi vs Asuka | 4–1 | 80.00% |
| Mr. Iwashi vs Shaheen | 2–2 | 50.00% |
| Mr. Iwashi vs Azucena | 4–0 | 100.00% |
| Mr. Iwashi vs Yoshimitsu | 0–3 | 0.00% |
| Mr. Iwashi vs Devil Jin | 2–1 | 66.67% |
| Mr. Iwashi vs Paul | 2–0 | 100.00% |
| Mr. Iwashi vs King | 2–0 | 100.00% |
| Mr. Iwashi vs Kazuya | 2–0 | 100.00% |
| Mr. Iwashi vs Lars | 2–0 | 100.00% |
| Mr. Iwashi vs Alisa | 2–0 | 100.00% |
| Mr. Iwashi vs Nina | 2–0 | 100.00% |
| Mr. Iwashi vs Jun | 2–0 | 100.00% |
| Mr. Iwashi vs Eddy | 1–1 | 50.00% |
| Mr. Iwashi vs Law | 1–0 | 100.00% |
| Mr. Iwashi vs Leo | 1–0 | 100.00% |
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.