How to tell them apart
あとで treats the first action as a completed event and then places the second action somewhere after it, so it works even when the two are not back-to-back (日本へ行ったあとで病気になった). てから chains actions in order and stresses that the second thing happens once the first is done, often as an immediate next step or an ongoing state since that point (シャワーを浴びてから寝る). Swapping them sounds off when you need the gap or the since sense.
- あとで Use あとで when the second event simply happens sometime after the first, not necessarily right away.
- てから Use てから when the second action follows directly after finishing the first or marks a point something has continued since.
| Grammar point | Meaning | JLPT level |
|---|---|---|
| あとで atode | later on; afterwards; after (a time or event) | N4 |
| てから tekara | Once something has been done; the time elapsed since an action | N5 |
あとで atode
later on; afterwards; after (a time or event)
あとで means later on or afterwards, and is used to delay an action to a later time or to show that one action follows another time or event. It can stand alone as an adverb, as in あとで電話します, or follow a noun with の, as in 仕事の後で, and a verb in the た form, as in 食べた後で. It is neutral in politeness, but note that the verb before 後で stays in the past form even when talking about the future.
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後で電話ちょうだいね。
Call me later.
-
また後で電話するね。
I'll call again later.
てから tekara
Once something has been done; the time elapsed since an action
てから marks that one action is completed before the next begins, often translated as after doing or since. It attaches to the te-form of a verb, as in 食べてから or 出てから, and is followed by the later action or a time expression like 10年になる. It emphasizes sequence and starting point more strongly than て alone, so avoid using it for unrelated background actions.
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日本を出てから１０年になる。
It has been ten years since I left Japan.
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大学を出てから10年になります。
It is ten years since I left college.
あとで and てから are JLPT N5–N4 grammar points that Japanese learners often mix up. This page compares them side by side on meanings, usage and example sentences, so you can tell them apart.