A bit odd that they didn't include Japan in their set of countries. My expectation is that it would have probably topped the list.
replies(4):
Btw, in both countries there's a rule (at least in Poland it's in the civic law, probably more like a custom in Switzerland), that the person who found your wallet can receive some share (finder's fee) of money, in Poland currently 10%.
It never occurred to me to get it to the Police station. Probably because they never found my wallet when I reported it (and reporting it was a PITA, 2 hours of lot time).