| Rengoku vs Reina | 38–44 | 46.34% |
| Rengoku vs King | 36–45 | 44.44% |
| Rengoku vs Eddy | 19–52 | 26.76% |
| Rengoku vs Kazuya | 28–37 | 43.08% |
| Rengoku vs Hwoarang | 23–34 | 40.35% |
| Rengoku vs Lili | 22–31 | 41.51% |
| Rengoku vs Steve | 16–32 | 33.33% |
| Rengoku vs Jin | 20–24 | 45.45% |
| Rengoku vs Jun | 21–21 | 50.00% |
| Rengoku vs Bryan | 15–23 | 39.47% |
| Rengoku vs Azucena | 21–17 | 55.26% |
| Rengoku vs Paul | 16–15 | 51.61% |
| Rengoku vs Asuka | 15–14 | 51.72% |
| Rengoku vs Yoshimitsu | 9–19 | 32.14% |
| Rengoku vs Dragunov | 15–12 | 55.56% |
| Rengoku vs Alisa | 13–14 | 48.15% |
| Rengoku vs Law | 12–13 | 48.00% |
| Rengoku vs Jack-8 | 11–13 | 45.83% |
| Rengoku vs Nina | 12–12 | 50.00% |
| Rengoku vs Victor | 13–10 | 56.52% |
| Rengoku vs Xiaoyu | 6–14 | 30.00% |
| Rengoku vs Devil Jin | 6–12 | 33.33% |
| Rengoku vs Lars | 6–11 | 35.29% |
| Rengoku vs Lee | 5–12 | 29.41% |
| Rengoku vs Feng | 5–11 | 31.25% |
| Rengoku vs Claudio | 3–13 | 18.75% |
| Rengoku vs Leo | 4–11 | 26.67% |
| Rengoku vs Raven | 9–6 | 60.00% |
| Rengoku vs Leroy | 5–7 | 41.67% |
| Rengoku vs Kuma | 5–6 | 45.45% |
| Rengoku vs Panda | 7–3 | 70.00% |
| Rengoku vs Zafina | 3–6 | 33.33% |
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.