The counter 1回 is used for counting: 1 time / occurrence (Category: 回 (kai) - Times/Occurrences, JLPT N4). 一 (ichi) contracts with 回 (kai) to form 'ikkai' (double consonant sokuon sound change).
Context Example
月に1回旅行します。
Tsuki ni ikkai ryokou shimasu.
I travel once a month.
Which counter represents "1 time / occurrence"?
Correct! 🎉
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