| Yamashi vs Kazuya | 39–27 | 59.09% |
| Yamashi vs Law | 32–29 | 52.46% |
| Yamashi vs Jin | 30–25 | 54.55% |
| Yamashi vs Bryan | 30–25 | 54.55% |
| Yamashi vs Dragunov | 29–20 | 59.18% |
| Yamashi vs Reina | 27–21 | 56.25% |
| Yamashi vs King | 27–20 | 57.45% |
| Yamashi vs Steve | 20–25 | 44.44% |
| Yamashi vs Hwoarang | 22–18 | 55.00% |
| Yamashi vs Asuka | 19–19 | 50.00% |
| Yamashi vs Eddy | 25–12 | 67.57% |
| Yamashi vs Jun | 22–10 | 68.75% |
| Yamashi vs Lee | 18–13 | 58.06% |
| Yamashi vs Yoshimitsu | 14–16 | 46.67% |
| Yamashi vs Azucena | 22–8 | 73.33% |
| Yamashi vs Lili | 15–14 | 51.72% |
| Yamashi vs Nina | 11–15 | 42.31% |
| Yamashi vs Lars | 9–15 | 37.50% |
| Yamashi vs Anna | 11–13 | 45.83% |
| Yamashi vs Paul | 10–11 | 47.62% |
| Yamashi vs Feng | 12–7 | 63.16% |
| Yamashi vs Leroy | 6–11 | 35.29% |
| Yamashi vs Jack-8 | 8–8 | 50.00% |
| Yamashi vs Raven | 7–8 | 46.67% |
| Yamashi vs Devil Jin | 5–9 | 35.71% |
| Yamashi vs Clive | 9–5 | 64.29% |
| Yamashi vs Leo | 7–5 | 58.33% |
| Yamashi vs Alisa | 7–5 | 58.33% |
| Yamashi vs Victor | 7–4 | 63.64% |
| Yamashi vs Heihachi | 6–4 | 60.00% |
| Yamashi vs Claudio | 6–3 | 66.67% |
| Yamashi vs Kuma | 3–6 | 33.33% |
| Yamashi vs Zafina | 3–5 | 37.50% |
| Yamashi vs Xiaoyu | 1–5 | 16.67% |
| Yamashi vs Shaheen | 1–3 | 25.00% |
| Yamashi vs Lidia | 3–0 | 100.00% |
| Yamashi vs Panda | 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.