If a large sum of cash is dropped in Japan, it will remain untouched for hours or days, and people will make efforts to return it to its owner.
"it's so safe you could throw money on the ground a l of cash and no one would touch that money it would sit there for hours if not days in fact someone would probably write a note on top of it post it in a Facebook group take it to the police station they would do everything they could to get that money back to you"