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

(obsolete) Washington, D.C. (a city, the capital city of the United States)

(rare) Philadelphia

(history, government) a 律令 (ritsuryō) department/position that's responsible for guarding, opening and closing the imperial gate

Obsolete spelling of コンスタンチノープル (“Constantinople (a city in the Ottoman Empire; modern Istanbul)”)

(obsolete) Sacramento (a city in California, United States)

Obsolete spelling of サクラメント (“Sacramento (a city in California, United States)”)