| Hahachi Mashima vs Clive | 64–28 | 69.57% |
| Hahachi Mashima vs King | 40–24 | 62.50% |
| Hahachi Mashima vs Kazuya | 27–30–1 | 47.37% |
| Hahachi Mashima vs Reina | 32–15 | 68.09% |
| Hahachi Mashima vs Bryan | 16–24 | 40.00% |
| Hahachi Mashima vs Law | 25–12 | 67.57% |
| Hahachi Mashima vs Jin | 22–14 | 61.11% |
| Hahachi Mashima vs Steve | 16–17 | 48.48% |
| Hahachi Mashima vs Asuka | 24–8 | 75.00% |
| Hahachi Mashima vs Yoshimitsu | 15–14 | 51.72% |
| Hahachi Mashima vs Heihachi | 18–11 | 62.07% |
| Hahachi Mashima vs Xiaoyu | 15–10 | 60.00% |
| Hahachi Mashima vs Dragunov | 17–8 | 68.00% |
| Hahachi Mashima vs Lili | 13–11 | 54.17% |
| Hahachi Mashima vs Victor | 11–11 | 50.00% |
| Hahachi Mashima vs Hwoarang | 12–9 | 57.14% |
| Hahachi Mashima vs Lidia | 10–11 | 47.62% |
| Hahachi Mashima vs Devil Jin | 11–9 | 55.00% |
| Hahachi Mashima vs Eddy | 13–6 | 68.42% |
| Hahachi Mashima vs Lee | 7–10 | 41.18% |
| Hahachi Mashima vs Paul | 6–9 | 40.00% |
| Hahachi Mashima vs Lars | 8–7 | 53.33% |
| Hahachi Mashima vs Leroy | 6–6 | 50.00% |
| Hahachi Mashima vs Jun | 6–5 | 54.55% |
| Hahachi Mashima vs Azucena | 6–5 | 54.55% |
| Hahachi Mashima vs Jack-8 | 4–6 | 40.00% |
| Hahachi Mashima vs Claudio | 6–4 | 60.00% |
| Hahachi Mashima vs Alisa | 7–2 | 77.78% |
| Hahachi Mashima vs Feng | 4–3 | 57.14% |
| Hahachi Mashima vs Nina | 7–0 | 100.00% |
| Hahachi Mashima vs Zafina | 2–5 | 28.57% |
| Hahachi Mashima vs Armor King | 3–2 | 60.00% |
| Hahachi Mashima vs Kuma | 2–2 | 50.00% |
| Hahachi Mashima vs Fahkumram | 2–2 | 50.00% |
| Hahachi Mashima vs Raven | 0–3 | 0.00% |
| Hahachi Mashima vs Leo | 2–0 | 100.00% |
| Hahachi Mashima vs Shaheen | 2–0 | 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.