[mock-possum]

Why “don’t eat and walk?” What if you’re hungry, and you want to go somewhere? What’s wrong with a snack and a stroll?

[Incipient]

You don't do that in Japan, it's considered taboo. You eat, then stroll. Take the time, enjoy the food, then go about your business of travel.

Japan has incredibly few bins in public for that reason/as a result of that reason.