| Masamune vs Jin | 170–132–1 | 56.29% |
| Masamune vs Kazuya | 152–129 | 54.09% |
| Masamune vs Dragunov | 131–119 | 52.40% |
| Masamune vs Bryan | 136–94 | 59.13% |
| Masamune vs King | 143–80 | 64.13% |
| Masamune vs Lili | 105–94 | 52.76% |
| Masamune vs Lee | 116–77 | 60.10% |
| Masamune vs Law | 111–77 | 59.04% |
| Masamune vs Hwoarang | 106–82 | 56.38% |
| Masamune vs Yoshimitsu | 106–81 | 56.68% |
| Masamune vs Nina | 99–82 | 54.70% |
| Masamune vs Reina | 83–77 | 51.88% |
| Masamune vs Feng | 78–76 | 50.65% |
| Masamune vs Clive | 67–84 | 44.37% |
| Masamune vs Lars | 77–68 | 53.10% |
| Masamune vs Paul | 84–53 | 61.31% |
| Masamune vs Alisa | 73–59 | 55.30% |
| Masamune vs Asuka | 52–60 | 46.43% |
| Masamune vs Devil Jin | 64–43 | 59.81% |
| Masamune vs Steve | 69–37 | 65.09% |
| Masamune vs Claudio | 67–37 | 64.42% |
| Masamune vs Victor | 64–38 | 62.75% |
| Masamune vs Azucena | 60–40 | 60.00% |
| Masamune vs Xiaoyu | 54–39 | 58.06% |
| Masamune vs Jack-8 | 51–42 | 54.84% |
| Masamune vs Jun | 49–35 | 58.33% |
| Masamune vs Eddy | 44–38 | 53.66% |
| Masamune vs Zafina | 34–46 | 42.50% |
| Masamune vs Leroy | 30–42 | 41.67% |
| Masamune vs Raven | 28–29 | 49.12% |
| Masamune vs Kuma | 34–22 | 60.71% |
| Masamune vs Leo | 26–28 | 48.15% |
| Masamune vs Lidia | 19–35 | 35.19% |
| Masamune vs Heihachi | 24–20 | 54.55% |
| Masamune vs Shaheen | 22–21 | 51.16% |
| Masamune vs Panda | 12–7 | 63.16% |
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.