Translation guide
The English word 'voluntary' describes actions done freely, without being forced or paid. In Japanese, the most natural expression depends on whether you are emphasizing free will, lack of obligation, unpaid work, or a voluntary organization.
Expressing that an action is done willingly, without external pressure or compulsion.
A common adjective meaning 'spontaneous' or 'voluntary', emphasizing that the action comes from one's own initiative.
I was grateful for his voluntary offer.
Often used in formal or legal contexts to mean 'optional' or 'at one's discretion', implying no obligation.
Participation is voluntary.
Literally 'by one's own will', this phrase clearly emphasizes personal choice.
He took on the job voluntarily.
Means 'willingly' or 'on one's own accord', often used when someone steps forward to do something.
She voluntarily helped me.
Referring to work done without payment, often for a cause or organization.
Describing an organization run by volunteers rather than professionals or paid staff.
Referring to bodily movements or actions that are controlled by the will.
Used in medical or biological contexts to describe voluntary muscle movements.
Voluntary muscles are muscles that can be moved consciously.
自発的 emphasizes spontaneity and personal initiative, while 任意 is more about the absence of obligation or rules. Use 自発的 for actions driven by inner will, and 任意 for optional participation or choices.
I raised my hand voluntarily (on my own initiative).
Participation is voluntary (not mandatory).
The English word 'voluntary' is sometimes directly borrowed as ボランタリー, but this is not natural Japanese. Use 自発的, 任意, or ボランティア depending on context.
He participated in voluntary service activities.
This circle operates as a voluntary association.