御所柿と渋柿は皮むかいでも知れる

Reading
ごしょがきとしぶがきはかわむかいでもしれる
English
It doesn't take a genius
Notes
You know知 a [sweet persimmon>御所柿 from a [sour persimmon>渋柿 without peeling the skin皮
Origin
江戸
proverbsKotoKen 2