以降・已降|いこうikou[1]atamadaka (head-high)

JLPT N2approx.Common
Which spelling to use
以降以降 is the common written form for expressing “on and after,” “from ... onward,” or “since”; it is the form learners should normally use.
已降已降 is a rarely used written variant, so you will seldom encounter it; choose 以降 instead.
Definitions
  1. noun, adverbon and after; from ... onward; since
    それ以降いこう彼かれは辛つらい一生いっしょうを送おくった。↗
    He led a hard life after that.
Synonyms & antonyms
  • Synonym以後いごNeutralDespite the antonym label, it refers to the same 'after a given time' as 「以降」 and is not truly opposite; the real antonym is 「以前」.
  • Synonym今後こんごNeutralTakes the present moment as its baseline, meaning 'from now on'; 「以降」 instead counts from a specified time.

Use 「以降」 for the period on and after a specified time, as in 「明日以降」. For 'from now on' on its own, 「以後」 works; when the baseline is the present, choose 「今後」. The true opposite is 「以前」.

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

Japanese definitions
  1. ある基準きじゅんになる時ときからあと。
Kanji in this word
English equivalents
See also

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

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