A proverb warning that those who laugh at (or neglect) small amounts of money will end up suffering over small sums; don't despise small savings.
毎日の小さな出費を馬鹿にしてはいけない。一銭を笑う者は一銭に泣くからね。
Don't mock small daily expenses. He who laughs at a penny will cry over a penny.
無駄遣いが積もって、結局貯金が全然ない。やはり一銭を笑う者は一銭に泣く。
Wasteful spending piled up and in the end there's no savings. Indeed, he who mocks a penny will cry over a penny.