不ふ夜や城じょう

noun

nightless city; city that never sleeps

Refers to a bustling entertainment district or city where lights and activity continue all night. Often used for historical or literary descriptions of pleasure quarters, but also for modern cities like New York or Tokyo.

• かつて吉よし原わらは不ふ夜や城じょうと呼よばれた。

  Yoshiwara was once called a nightless city.

• 東とう京きょうはまさに不ふ夜や城じょうだ。

  Tokyo is truly a city that never sleeps.