I bet the Japanese tend to leave their rented apartments in pretty good condition. Regular wear and tear, but none of the uncaring neglect and abuse discussed in this thread.
Tenants should either post insurance or a sum sufficient to cover damages but not two months rent.
I think that’s perfectly reasonable. And if landlords can’t accept that, then they shouldn’t be renting out in the first place.
If you don’t trust tenants, any money they could post as surety doesn’t really matter.
A better maintained and cleaner apt the likes you’ve never seen. Though the non Japanese tend to not care as much and tend to be trouble.