How to say "period" in Japanese

Choosing the right word
  • 時代じだいJLPT N4approx.Common
    nounCovers 'period' in the historical sense: an era or age marked by particular events, culture or conditions, as in a named period of history. Not for short measured spans of time.
    今いまや時代じだいとの競争きょうそうになった。↗
    It was now a race against time.
  • 期間きかんJLPT N3approx.Common
    nounThe word for 'period' as a measured span of time between two points: a duration such as a contract or rental period, or a period of some months.
    治なおるのにどのくらいの期間きかんがかかりますか。↗
    How long will it take to get well?
  • 期きJLPT N1approx.Common
    noun, noun (suffix)In practice little used as an independent word; it serves chiefly as an element inside compound words for defined or scheduled stretches of time, so it is seldom the word you want to say 'period' by itself.
    The economy has entered a recession.
  • 時期じきJLPT N3approx.Common
    noun, adverbFor 'period' meaning a phase or stretch of time within a larger course of events: the time when something happens, is done, or is at a certain stage, rather than a precisely measured duration.
    1年ねんのこの時期じきは天候てんこうがよく変かわる。↗
    The weather changes very often at this time of year.
  • 期限きげんJLPT N2approx.Common
    nounCovers 'period' when it means a bounded term or time frame ending at a set cutoff: the stretch by which something must be done or expires — a deadline-like sense, not a general duration.

Use 時代 for historical eras, 期間 for a measured span or duration, 時期 for a phase or season within a process, 期限 for a term with a deadline, and 期 mainly as an element in compounds.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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