Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
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Vocabulary
Non-JLPT
Day 140
逆算
New
逆算
逆算
ぎゃくさん
back-calculation, counting backward
noun
Sino-Japanese
Lv.4
Again
1
Hard
2
Good
3
Easy
4
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Space flip · 1–4 grade · ← → move
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