Translation guide
Expresses that an action is done voluntarily, deliberately, or out of personal preference, rather than by obligation or accident.
The speaker does something because they want to, not because they are forced.
Literally 'by one's own will'. A clear, natural way to emphasize voluntary action.
The action is intentional, not accidental.
The most common word for 'on purpose'. Can be used in both positive and negative contexts.
Indicates a personal preference or selection among options.
Means 'by preference' or 'willingly'. Often used with verbs like 選ぶ (choose) or 使う (use).
The English phrase 'by choice' does not have a single direct equivalent in Japanese. The appropriate expression depends on whether you mean 'voluntarily', 'deliberately', or 'by preference'.
He took on that job by choice.
Means 'willingly' or 'on one's own initiative'. Slightly more formal.
She participated in the volunteer work by choice.
Casual. Implies doing something because one likes it, often used when explaining a seemingly undesirable choice.
I'm not doing this job by choice.
彼はわざと私を無視した。
He ignored me by choice.
Formal, often used in legal or serious contexts. Implies malicious intent.
He broke the rule by choice.
He eats Japanese food by choice.
Literally 'by one's own choice'. Direct and clear.
I came to this university by choice.