JMdict: 1255440

月とスッポン 【つきとすっぽん】

  1. [exp,n] two things that are superficially similar but completely different; night and day; chalk and cheese; the Moon and a turtle
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
月 Month, Moon ゲツ, ガツ つき