noun
nonfiction
Refers to factual prose literature, as opposed to fiction. Common in discussions of books, articles, and documentaries.
彼は歴史のノンフィクションをよく読む。
He often reads historical nonfiction.
この本はノンフィクションです。
This book is nonfiction.
フィクション means 'fiction', the opposite of ノンフィクション.
Borrowed from English 'nonfiction'.