Illustration: On the floor of a Japanese apartment, a child has built a winding line of wooden domino blocks around the low table. Their fingertip has just tipped the first block, and the next several are already falling into one another.

いったん

ittan

once

Often used with a conditional to mean 'once something happens'. Note written by AI.

Example sentences

いったん約束やくそくをしたら、守まもらなくてはいけない。
Once you have made a promise, you should keep it.
Tatoeba · CC BY 2.0 FR · Source
いったん始はじめたら、やり続つづけてください。
Once you start, carry it on.
Tatoeba · CC BY 2.0 FR · Source
いったん悪わるい癖くせがつくと、なおすのは難むずかしい。
Once a bad habit is formed, it is hard to get rid of it.
Tatoeba · CC BY 2.0 FR · Source

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