Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
App Store
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Vocabulary
N1
Day 1
さん
New
さん
さん
Mr./Ms. ~
suffix
native Japanese
Lv.1
Again
1
Hard
2
Good
3
Easy
4
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