documentary (documentary film)

historic, historical / already-happened, past / former, old, traditional

historian

study of history

(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

oral history

historicism

(euphemistic) the world's oldest profession

Japanese food, Japanese cuisine

Japanese foods, Japanese cuisine