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

Japanese food, Japanese cuisine

Japanese foods, Japanese cuisine

Japanese-style painting - Japanese paintings based on Japonism

a Japanese sword

State of Japan (de facto official name of Japan, 1947 to present)

(rare) State of Japan (de facto official name of Japan, 1947 to present)