盛せい期き

noun

prosperous period; heyday; peak

Refers to a time when something is at its height of prosperity, activity, or influence. Often used in historical or business contexts.

• この町まちは江え戸ど時じ代だいに商しょう業ぎょうの盛せい期きを迎むかえた。

  This town reached its commercial heyday during the Edo period.

• 彼かれの作さっ家かとしての盛せい期きは短みじかかった。

  His peak as a writer was short.