| KOIWASU vs Bryan | 619–581 | 51.58% |
| KOIWASU vs Hwoarang | 567–581 | 49.39% |
| KOIWASU vs Dragunov | 484–505 | 48.94% |
| KOIWASU vs King | 483–442 | 52.22% |
| KOIWASU vs Kazuya | 420–500 | 45.65% |
| KOIWASU vs Asuka | 512–335 | 60.45% |
| KOIWASU vs Steve | 379–439 | 46.33% |
| KOIWASU vs Jin | 384–399 | 49.04% |
| KOIWASU vs Lars | 397–349 | 53.22% |
| KOIWASU vs Yoshimitsu | 375–356 | 51.30% |
| KOIWASU vs Law | 380–335 | 53.15% |
| KOIWASU vs Feng | 306–336 | 47.66% |
| KOIWASU vs Paul | 284–349 | 44.87% |
| KOIWASU vs Jack-8 | 310–312 | 49.84% |
| KOIWASU vs Eddy | 303–304 | 49.92% |
| KOIWASU vs Reina | 306–299 | 50.58% |
| KOIWASU vs Lili | 307–290 | 51.42% |
| KOIWASU vs Alisa | 297–291 | 50.51% |
| KOIWASU vs Claudio | 310–274 | 53.08% |
| KOIWASU vs Victor | 274–309 | 47.00% |
| KOIWASU vs Devil Jin | 291–277 | 51.23% |
| KOIWASU vs Heihachi | 256–311 | 45.15% |
| KOIWASU vs Azucena | 245–282 | 46.49% |
| KOIWASU vs Nina | 272–247 | 52.41% |
| KOIWASU vs Jun | 236–269 | 46.73% |
| KOIWASU vs Lee | 239–262 | 47.70% |
| KOIWASU vs Xiaoyu | 238–242 | 49.58% |
| KOIWASU vs Leroy | 249–216 | 53.55% |
| KOIWASU vs Shaheen | 229–224 | 50.55% |
| KOIWASU vs Lidia | 266–185 | 58.98% |
| KOIWASU vs Clive | 157–230 | 40.57% |
| KOIWASU vs Anna | 210–176 | 54.40% |
| KOIWASU vs Leo | 163–191 | 46.05% |
| KOIWASU vs Raven | 170–168 | 50.30% |
| KOIWASU vs Zafina | 180–143 | 55.73% |
| KOIWASU vs Kuma | 133–126 | 51.35% |
| KOIWASU vs Fahkumram | 103–141 | 42.21% |
| KOIWASU vs Armor King | 72–98 | 42.35% |
| KOIWASU vs Miary Zo | 65–101 | 39.16% |
| KOIWASU vs Panda | 56–72 | 43.75% |
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.