子供は3歳までに一生分の親孝行をするこどもはさんさいまでにいっしょうぶんのおやこうこうをすることわざchildren pay back their debt to their parents in full by age 3 (through their cuteness)
父母の恩は山よりも高く海よりも深しふぼのおんはやまよりもたかくうみよりもふかしことわざour debt to our parents is higher than the mountain and deeper than the sea