| Reiko vs Jin | 20–22 | 47.62% |
| Reiko vs Steve | 20–12 | 62.50% |
| Reiko vs Clive | 16–16 | 50.00% |
| Reiko vs Lili | 15–14 | 51.72% |
| Reiko vs Reina | 19–8 | 70.37% |
| Reiko vs King | 13–9 | 59.09% |
| Reiko vs Victor | 11–9 | 55.00% |
| Reiko vs Yoshimitsu | 5–9 | 35.71% |
| Reiko vs Law | 5–7 | 41.67% |
| Reiko vs Lars | 4–8 | 33.33% |
| Reiko vs Bryan | 5–6 | 45.45% |
| Reiko vs Leo | 5–6 | 45.45% |
| Reiko vs Jun | 6–5 | 54.55% |
| Reiko vs Dragunov | 2–8 | 20.00% |
| Reiko vs Jack-8 | 6–3 | 66.67% |
| Reiko vs Kazuya | 1–7 | 12.50% |
| Reiko vs Panda | 3–5 | 37.50% |
| Reiko vs Paul | 1–6 | 14.29% |
| Reiko vs Xiaoyu | 1–6 | 14.29% |
| Reiko vs Asuka | 4–3 | 57.14% |
| Reiko vs Lidia | 1–6 | 14.29% |
| Reiko vs Heihachi | 1–6 | 14.29% |
| Reiko vs Claudio | 5–1 | 83.33% |
| Reiko vs Azucena | 5–1 | 83.33% |
| Reiko vs Kuma | 2–2 | 50.00% |
| Reiko vs Eddy | 1–3 | 25.00% |
| Reiko vs Alisa | 2–1 | 66.67% |
| Reiko vs Nina | 2–1 | 66.67% |
| Reiko vs Zafina | 1–2 | 33.33% |
| Reiko vs Hwoarang | 2–0 | 100.00% |
| Reiko vs Feng | 2–0 | 100.00% |
| Reiko vs Leroy | 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.