人は見かけによらぬもの
Meanings
1
appearances can be deceiving; don't judge a book by its cover
Proverb meaning that outward appearance does not reflect true character or ability. Often used when someone's actions or nature differ from what their looks suggest.
He looks scary, but he's actually very kind. Appearances can be deceiving, right?
That tiny shop serves such delicious ramen—you really can't judge a book by its cover.