Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
App Store
Google Play
Vocabulary
N2
Day 1
工事
New
工事
工事
こうじ
construction work
noun
Sino-Japanese
Lv.3
Again
1
Hard
2
Good
3
Easy
4
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