| Mashima vs Asuka | 8–6 | 57.14% |
| Mashima vs King | 7–5 | 58.33% |
| Mashima vs Lee | 4–5 | 44.44% |
| Mashima vs Law | 2–5 | 28.57% |
| Mashima vs Kazuya | 3–4 | 42.86% |
| Mashima vs Devil Jin | 5–1 | 83.33% |
| Mashima vs Paul | 2–3 | 40.00% |
| Mashima vs Hwoarang | 4–1 | 80.00% |
| Mashima vs Lili | 0–5 | 0.00% |
| Mashima vs Reina | 4–1 | 80.00% |
| Mashima vs Clive | 1–4 | 20.00% |
| Mashima vs Steve | 2–2 | 50.00% |
| Mashima vs Eddy | 1–3 | 25.00% |
| Mashima vs Xiaoyu | 0–3 | 0.00% |
| Mashima vs Bryan | 1–2 | 33.33% |
| Mashima vs Panda | 2–1 | 66.67% |
| Mashima vs Jin | 1–1 | 50.00% |
| Mashima vs Nina | 0–2 | 0.00% |
| Mashima vs Victor | 2–0 | 100.00% |
| Mashima vs Heihachi | 2–0 | 100.00% |
| Mashima vs Anna | 2–0 | 100.00% |
| Mashima vs Fahkumram | 0–2 | 0.00% |
| Mashima vs Alisa | 0–1 | 0.00% |
| Mashima vs Claudio | 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.