最盛期(さいせいき)

さいせいき
noun
peak period, heyday, prime
time-period
1. peak period, heyday, prime, height
The period when something is at its most active, productive, or prosperous. Used for seasons, industries, careers, civilizations, and other things that have a high point.
桜(さくら)の最盛期(さいせいき)は四月(しがつ)だ。
The peak season for cherry blossoms is April.
あの歌手(かしゅ)は今(いま)が最盛期(さいせいき)だ。
That singer is at the peak of their career right now.
ローマ帝国(ていこく)は二(に)世紀(せいき)ごろに最盛期(さいせいき)を迎(むか)え、広大(こうだい)な領土(りょうど)を支配(しはい)していた。
The Roman Empire reached its peak around the 2nd century and controlled vast territory.

Common collocations

Etymology

最(さい) (most) + 盛(せい) (flourishing) + 期(き) (period) — the period of greatest flourishing.

Similar words

最盛期(さいせいき) focuses on the peak of activity or prosperity. 全盛期(ぜんせいき) (golden age, heyday) is similar but often carries a stronger sense of past glory or looking back at a period that has ended.

Related Words

Compare: 盛(さか)り (peak)
Compare: ピーク (peak, highest point)
Compare: 全盛(ぜんせい) (height of prosperity)
Compare: 繁盛期(はんじょうき) (peak season)
general
Added 2026.2.23 19:05 · Revised 2026.9.2 13:01
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