| Iwasaki vs King | 52–51 | 50.49% |
| Iwasaki vs Steve | 56–40 | 58.33% |
| Iwasaki vs Kazuya | 29–46 | 38.67% |
| Iwasaki vs Reina | 43–30 | 58.90% |
| Iwasaki vs Hwoarang | 29–37 | 43.94% |
| Iwasaki vs Armor King | 35–31 | 53.03% |
| Iwasaki vs Heihachi | 20–41 | 32.79% |
| Iwasaki vs Law | 27–32 | 45.76% |
| Iwasaki vs Jin | 22–32 | 40.74% |
| Iwasaki vs Eddy | 23–29 | 44.23% |
| Iwasaki vs Dragunov | 20–26–1 | 43.48% |
| Iwasaki vs Bryan | 17–29 | 36.96% |
| Iwasaki vs Clive | 18–28 | 39.13% |
| Iwasaki vs Lili | 18–27 | 40.00% |
| Iwasaki vs Azucena | 24–20 | 54.55% |
| Iwasaki vs Paul | 16–23 | 41.03% |
| Iwasaki vs Lee | 17–21 | 44.74% |
| Iwasaki vs Yoshimitsu | 11–26 | 29.73% |
| Iwasaki vs Nina | 15–17 | 46.88% |
| Iwasaki vs Victor | 7–25 | 21.88% |
| Iwasaki vs Xiaoyu | 15–15 | 50.00% |
| Iwasaki vs Leroy | 13–17 | 43.33% |
| Iwasaki vs Jun | 12–17 | 41.38% |
| Iwasaki vs Asuka | 12–15 | 44.44% |
| Iwasaki vs Claudio | 9–11 | 45.00% |
| Iwasaki vs Lidia | 5–15 | 25.00% |
| Iwasaki vs Feng | 10–9 | 52.63% |
| Iwasaki vs Lars | 5–14 | 26.32% |
| Iwasaki vs Raven | 9–7 | 56.25% |
| Iwasaki vs Devil Jin | 5–8 | 38.46% |
| Iwasaki vs Leo | 6–5 | 54.55% |
| Iwasaki vs Fahkumram | 6–3 | 66.67% |
| Iwasaki vs Anna | 3–5 | 37.50% |
| Iwasaki vs Alisa | 3–4 | 42.86% |
| Iwasaki vs Zafina | 0–6 | 0.00% |
| Iwasaki vs Shaheen | 1–4 | 20.00% |
| Iwasaki vs Panda | 3–1 | 75.00% |
| Iwasaki vs Jack-8 | 2–1 | 66.67% |
| Iwasaki vs Kuma | 1–1 | 50.00% |
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.