(archaic) Japan

Short for 日本国 (Nihon-koku): Japan (a country and archipelago in East Asia) / a surname

a non-migratory fish that lives among the roots of seaweed or coral

oral history

historicism

historian

(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

study of history

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

cultural festival (a regularly-held Japanese school event meant to display the activities of the students)