井の中の蛙 いのなかのかわず Meanings Expression person who is ignorant of the real world (literally: frog in a well) Kanji 井 well. Read as い. 中 middle. Read as なか. 蛙 frog. Read as かわず. Example sentences 井の中の蛙、大海を知らず。He who stays in the valley shall never get over the hill. Words containing 井の中の蛙 井の中の蛙、大海を知らず (いのなかのかわず、たいかいをしらず) the frog in the well knows nothing of the great ocean Jinuma: Japanese Dictionary · Word lists