| Masamune vs Reina | 6–7 | 46.15% |
| Masamune vs Steve | 4–8 | 33.33% |
| Masamune vs Clive | 4–8 | 33.33% |
| Masamune vs Victor | 1–8 | 11.11% |
| Masamune vs Lili | 2–4 | 33.33% |
| Masamune vs Jin | 1–4 | 20.00% |
| Masamune vs Zafina | 2–2 | 50.00% |
| Masamune vs Eddy | 1–3 | 25.00% |
| Masamune vs King | 0–3 | 0.00% |
| Masamune vs Yoshimitsu | 2–1 | 66.67% |
| Masamune vs Claudio | 1–2 | 33.33% |
| Masamune vs Jun | 3–0 | 100.00% |
| Masamune vs Raven | 0–3 | 0.00% |
| Masamune vs Anna | 1–2 | 33.33% |
| Masamune vs Law | 0–2 | 0.00% |
| Masamune vs Bryan | 0–2 | 0.00% |
| Masamune vs Kazuya | 0–2 | 0.00% |
| Masamune vs Alisa | 0–2 | 0.00% |
| Masamune vs Kuma | 0–2 | 0.00% |
| Masamune vs Lidia | 0–2 | 0.00% |
| Masamune vs Heihachi | 2–0 | 100.00% |
| Masamune vs Hwoarang | 0–1 | 0.00% |
| Masamune vs Dragunov | 0–1 | 0.00% |
| Masamune vs Leo | 0–1 | 0.00% |
| Masamune vs Lee | 0–1 | 0.00% |
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.