8. Melon drop scam
Tourists are usually looking all around and commonly bumping into people. However, some people might be carrying expensive champagne or scotch bottles, or even melons (they can be very expensive in Japan, hence the name). The melons are dirt cheap, and the bottles are filled with cheap liquor (the bottles can be taken from high-end restaurant dumpers). Of course, the person carrying is furious and the tourists pay a high price for the inconvenience.