| Rei Hayashi vs Kazuya | 59–52 | 53.15% |
| Rei Hayashi vs Jin | 47–49 | 48.96% |
| Rei Hayashi vs Reina | 47–32 | 59.49% |
| Rei Hayashi vs King | 43–30 | 58.90% |
| Rei Hayashi vs Dragunov | 35–37 | 48.61% |
| Rei Hayashi vs Hwoarang | 35–32 | 52.24% |
| Rei Hayashi vs Bryan | 39–20 | 66.10% |
| Rei Hayashi vs Clive | 37–15 | 71.15% |
| Rei Hayashi vs Heihachi | 22–26 | 45.83% |
| Rei Hayashi vs Yoshimitsu | 17–25 | 40.48% |
| Rei Hayashi vs Lili | 22–19 | 53.66% |
| Rei Hayashi vs Steve | 24–16 | 60.00% |
| Rei Hayashi vs Devil Jin | 16–24 | 40.00% |
| Rei Hayashi vs Lee | 28–11 | 71.79% |
| Rei Hayashi vs Jun | 21–17 | 55.26% |
| Rei Hayashi vs Law | 16–19 | 45.71% |
| Rei Hayashi vs Paul | 12–21 | 36.36% |
| Rei Hayashi vs Asuka | 19–9 | 67.86% |
| Rei Hayashi vs Feng | 16–11 | 59.26% |
| Rei Hayashi vs Azucena | 11–15 | 42.31% |
| Rei Hayashi vs Lars | 8–15 | 34.78% |
| Rei Hayashi vs Alisa | 11–10 | 52.38% |
| Rei Hayashi vs Kuma | 7–9 | 43.75% |
| Rei Hayashi vs Claudio | 6–8 | 42.86% |
| Rei Hayashi vs Shaheen | 10–4 | 71.43% |
| Rei Hayashi vs Nina | 6–8 | 42.86% |
| Rei Hayashi vs Victor | 7–7 | 50.00% |
| Rei Hayashi vs Eddy | 7–5 | 58.33% |
| Rei Hayashi vs Leroy | 3–7 | 30.00% |
| Rei Hayashi vs Anna | 6–4 | 60.00% |
| Rei Hayashi vs Fahkumram | 2–8 | 20.00% |
| Rei Hayashi vs Jack-8 | 2–7 | 22.22% |
| Rei Hayashi vs Zafina | 1–8 | 11.11% |
| Rei Hayashi vs Raven | 5–4 | 55.56% |
| Rei Hayashi vs Lidia | 4–5 | 44.44% |
| Rei Hayashi vs Xiaoyu | 5–3 | 62.50% |
| Rei Hayashi vs Leo | 5–3 | 62.50% |
| Rei Hayashi vs Panda | 0–2 | 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.