| Mashima vs Jin | 63–84 | 42.86% |
| Mashima vs Kazuya | 57–72 | 44.19% |
| Mashima vs Hwoarang | 46–47 | 49.46% |
| Mashima vs Reina | 46–41 | 52.87% |
| Mashima vs King | 41–42 | 49.40% |
| Mashima vs Yoshimitsu | 41–32 | 56.16% |
| Mashima vs Law | 28–35 | 44.44% |
| Mashima vs Bryan | 19–34 | 35.85% |
| Mashima vs Paul | 18–33 | 35.29% |
| Mashima vs Lili | 21–28 | 42.86% |
| Mashima vs Steve | 26–20 | 56.52% |
| Mashima vs Victor | 19–27 | 41.30% |
| Mashima vs Lars | 13–27 | 32.50% |
| Mashima vs Devil Jin | 20–19 | 51.28% |
| Mashima vs Nina | 17–22 | 43.59% |
| Mashima vs Jun | 19–20 | 48.72% |
| Mashima vs Azucena | 20–18 | 52.63% |
| Mashima vs Eddy | 15–21 | 41.67% |
| Mashima vs Dragunov | 17–15 | 53.12% |
| Mashima vs Asuka | 10–18 | 35.71% |
| Mashima vs Alisa | 11–16 | 40.74% |
| Mashima vs Feng | 7–16 | 30.43% |
| Mashima vs Jack-8 | 12–10 | 54.55% |
| Mashima vs Xiaoyu | 13–7–1 | 65.00% |
| Mashima vs Lee | 6–15 | 28.57% |
| Mashima vs Leroy | 9–9 | 50.00% |
| Mashima vs Zafina | 8–9 | 47.06% |
| Mashima vs Raven | 7–10 | 41.18% |
| Mashima vs Claudio | 9–5 | 64.29% |
| Mashima vs Shaheen | 5–8 | 38.46% |
| Mashima vs Leo | 3–9 | 25.00% |
| Mashima vs Kuma | 5–7 | 41.67% |
| Mashima vs Panda | 5–2 | 71.43% |
| Mashima vs Lidia | 2–2 | 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.