I do carry a coin purse, and I have no use for 1 yen coins. Sure, 10 yen, 50 yen, and 100 yen coins are easily spent, but 1 yen is not. Same issue with pennies

I do carry a coin purse, and I have no use for 1 yen coins. Sure, 10 yen, 50 yen, and 100 yen coins are easily spent, but 1 yen is not. Same issue with pennies in the US.