also: ヴォランタリー
na-adjective
Used as an adjectival noun (na-adjective) to describe actions, organizations, or work done willingly and without obligation. Common in contexts like volunteer work or voluntary participation.
彼はボランタリーな活動に参加している。
He participates in voluntary activities.
この団体は完全にボランタリーで運
This organization is run entirely on a voluntary basis.