Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
App Store
Google Play
Vocabulary
N2
Day 1
ごめん
New
ごめん
ごめん
御免
sorry (casual)
expression
set phrase
Lv.2
Again
1
Hard
2
Good
3
Easy
4
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