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以後 (いご) Japanese meaning | Kotomora

以い後ご

い

ご

Common word›JLPTN3›Freq.FrequencyTop 10,000

Meanings

1

after this; from now on; hereafter

Refers to a point in time after the present or a specified reference point; often used in formal or written contexts.

以

い

後ご

、

気き

を

つけ

ます

。

I'll be careful from now on.

午ご後ご6時じ以い後ごは電でん話わに出でられません。

I cannot answer the phone after 6 p.m.

2

thereafter; since then; after that

Used after a specific event or time expression, especially after あれ, それ, or the -te form of a verb, to mean 'after that' or 'since then'.

彼かれは大だい学がくを卒そつ業ぎょうして以い後ご、一いち度ども会あっていない。
I haven't seen him since he graduated from university.
あれ以い後ご、彼かれから連れん絡らくがない。
I haven't heard from him since then.

Usage patterns

〈時とき〉以い後ごfrom/after a specified time onward
卒そつ業ぎょう以い後ご、彼かの女じょとは一いち度ども会あっていない。
I haven't met her even once since graduation.
それ以い後ごsince then; thereafter
彼かれはそれ以い後ご、一いち度ども遅ち刻こくしていない。
He hasn't been late even once since then.

Kanji

以by means of, because, in view of
後behind, back, later
已stop, halt, previously

Related words

以い降こうN3
以降 is the more common, everyday word for 'after/since', while 以後 sounds slightly more formal and appears in set phrases or written notices.
今こん後ごN3sense 1
今後 specifically means 'from now on' looking forward from the present, while 以後 can also refer to a point after any specified past reference.
その後あと sense 2
その後 is a casual, conversational way to say 'after that', while 以後 in this sense is used in more formal or written narration.
以い来らいN3
以後 simply means 'after' a point in time and can describe future events too, whereas 以来 emphasizes an unbroken continuation from a past event up to the present.
年ねん後ご
年後 marks a point a certain number of years after a reference event, while 以後 more broadly means 'from that point on' without specifying years.

Opposites

以い前ぜんN3
以前 means 'before' a point in time, the direct opposite of 以後, which means 'after' it.

Don't confuse with

以い内ないN4
以内 means 'within (a limit)', not 'after'; learners confuse it with 以後 because both start with 以 and involve time or quantity ranges.

Word family

自じ今こん以い後ご
henceforth; hereafter

Written forms

以い後ごUsage100%
Standard kanji form; high-frequency in news and general use.
已い後ごUsage<1%
rarely-used kanji form
Rarely used kanji form; 已 is an older variant of 以.

Etymology

Compound of 以 (i, 'from') and 後 (go, 'after'). The kanji 已 is an older variant of 以, now rarely used.