Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
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Vocabulary
Non-JLPT
Day 131
夜通し
New
夜通し
夜通し
よどおし
all night long
adverb
native Japanese
Lv.4
Again
1
Hard
2
Good
3
Easy
4
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