| Arumaki vs King | 14–6 | 70.00% |
| Arumaki vs Kazuya | 8–10 | 44.44% |
| Arumaki vs Bryan | 9–5 | 64.29% |
| Arumaki vs Dragunov | 6–6 | 50.00% |
| Arumaki vs Armor King | 3–9 | 25.00% |
| Arumaki vs Jin | 6–4 | 60.00% |
| Arumaki vs Steve | 3–7 | 30.00% |
| Arumaki vs Law | 6–3 | 66.67% |
| Arumaki vs Fahkumram | 2–6 | 25.00% |
| Arumaki vs Azucena | 6–1 | 85.71% |
| Arumaki vs Anna | 3–4 | 42.86% |
| Arumaki vs Yoshimitsu | 1–5 | 16.67% |
| Arumaki vs Asuka | 2–4 | 33.33% |
| Arumaki vs Lars | 4–2 | 66.67% |
| Arumaki vs Claudio | 2–4 | 33.33% |
| Arumaki vs Reina | 4–2 | 66.67% |
| Arumaki vs Heihachi | 3–3 | 50.00% |
| Arumaki vs Miary Zo | 4–2 | 66.67% |
| Arumaki vs Lili | 2–3 | 40.00% |
| Arumaki vs Lidia | 3–2 | 60.00% |
| Arumaki vs Paul | 2–2 | 50.00% |
| Arumaki vs Hwoarang | 2–2 | 50.00% |
| Arumaki vs Xiaoyu | 3–1 | 75.00% |
| Arumaki vs Nina | 2–2 | 50.00% |
| Arumaki vs Victor | 1–3 | 25.00% |
| Arumaki vs Eddy | 1–3 | 25.00% |
| Arumaki vs Jack-8 | 2–1 | 66.67% |
| Arumaki vs Alisa | 2–0 | 100.00% |
| Arumaki vs Raven | 0–2 | 0.00% |
| Arumaki vs Clive | 1–1 | 50.00% |
| Arumaki vs Devil Jin | 1–0 | 100.00% |
| Arumaki vs Lee | 0–1 | 0.00% |
| Arumaki vs Jun | 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.