also: ドキュメンタリ
noun
A non-fiction film or television program presenting facts about a subject. Used as a noun, often in compounds like ドキュメンタリー番組.
昨夜、環境問題についてのドキュメンタリーを見た。
Last night I watched a documentary about environmental issues.
彼は戦争のドキュメンタリーを制
He is producing a war documentary.