井いの中なかの蛙かわず

expression

person ignorant of the wider world; frog in a well

Proverb describing someone with a narrow perspective who is unaware of the larger world. Often used critically or self-deprecatingly. The literal image is a frog that knows only its well.

• 彼かれは井いの中なかの蛙かわずで、海かい外がいの事じ情じょうをまったく知しらない。

  He's a frog in a well and knows nothing about the situation overseas.

• 井いの中なかの蛙かわず大たい海かいを知しらず、という言こと葉ばがある。

  There's a saying: 'The frog in the well knows nothing of the great ocean.'