| English | Japanese |
| n vs adj-na adj-no arbitrary decision | 擅断 |
| n vs arbitrary decision | 独り決め |
| n vs adj-na adj-no arbitrary decision | 専断 |
| by one's arbitrary decision | 勝手ながら with noun+する or noun+をverb |
| n making arbitrary decisions which benefit oneself | 御手盛り |
| n making arbitrary decisions which benefit oneself | お手盛り news2 nf33 (おてもり) |
| n yoji rife with arbitrary decisions | 専断横行 (acting on one's own authority) |