expression
like father, like son; a child who does not resemble their parents is a changeling
Proverb meaning that children naturally resemble their parents in character or behavior; the literal sense is that a child unlike the parents is like a demon child.
彼の頑固さは父親譲りだ。親に似ぬ子は鬼子というからな。
His stubbornness comes from his father. Like father, like son, as they say.
A traditional Japanese proverb. The exact origin is uncertain, but it reflects the folk belief that a child who does not resemble the parents might be a supernatural being.