Ok when across in Japan I played these till the cows came home and I really loved them. The problem was when I won a load of medals of the Monopoly pusher machine (and I mean a LOAD like 2000+) I didnt have the slightest clue what to do with them.
I know gambling for cash in Japan is illigal as the sign on the medal exchange machine told me so . So really what do you do with all the medals/balls you win?
Exchange the balls for a prize, take the prize around the corner and trade THAT for money. According to Japanese law, it's not gambling if you sell them their product back.