| Oniwakamaru vs Jin | 272–258–1 | 51.32% |
| Oniwakamaru vs Kazuya | 277–220 | 55.73% |
| Oniwakamaru vs Hwoarang | 228–258 | 46.91% |
| Oniwakamaru vs Bryan | 187–217 | 46.29% |
| Oniwakamaru vs King | 203–182 | 52.73% |
| Oniwakamaru vs Paul | 174–204 | 46.03% |
| Oniwakamaru vs Law | 181–143 | 55.86% |
| Oniwakamaru vs Steve | 169–133 | 55.96% |
| Oniwakamaru vs Reina | 176–121 | 59.26% |
| Oniwakamaru vs Dragunov | 132–131 | 50.19% |
| Oniwakamaru vs Lili | 114–124 | 47.90% |
| Oniwakamaru vs Yoshimitsu | 109–126 | 46.38% |
| Oniwakamaru vs Devil Jin | 96–122 | 44.04% |
| Oniwakamaru vs Lee | 106–107 | 49.77% |
| Oniwakamaru vs Jun | 95–114 | 45.45% |
| Oniwakamaru vs Lars | 96–99 | 49.23% |
| Oniwakamaru vs Feng | 89–103 | 46.35% |
| Oniwakamaru vs Alisa | 76–110 | 40.86% |
| Oniwakamaru vs Heihachi | 94–87 | 51.93% |
| Oniwakamaru vs Azucena | 77–94 | 45.03% |
| Oniwakamaru vs Eddy | 97–67 | 59.15% |
| Oniwakamaru vs Nina | 68–94 | 41.98% |
| Oniwakamaru vs Miary Zo | 70–87 | 44.59% |
| Oniwakamaru vs Asuka | 84–64 | 56.76% |
| Oniwakamaru vs Leroy | 80–66 | 54.79% |
| Oniwakamaru vs Xiaoyu | 79–66 | 54.48% |
| Oniwakamaru vs Claudio | 73–69 | 51.41% |
| Oniwakamaru vs Victor | 67–72 | 48.20% |
| Oniwakamaru vs Lidia | 71–63 | 52.99% |
| Oniwakamaru vs Jack-8 | 58–67 | 46.40% |
| Oniwakamaru vs Raven | 65–58 | 52.85% |
| Oniwakamaru vs Leo | 43–63 | 40.57% |
| Oniwakamaru vs Zafina | 49–43 | 53.26% |
| Oniwakamaru vs Armor King | 46–45 | 50.55% |
| Oniwakamaru vs Kuma | 46–38 | 54.76% |
| Oniwakamaru vs Shaheen | 42–36 | 53.85% |
| Oniwakamaru vs Fahkumram | 34–43 | 44.16% |
| Oniwakamaru vs Anna | 18–22 | 45.00% |
| Oniwakamaru vs Clive | 9–24 | 27.27% |
| Oniwakamaru vs Panda | 15–16–1 | 48.39% |
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.