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Tokyo has almost no trash cans. Yet it's one of the cleanest cities on Earth. Why? If you visit Japan, you'll notice something strange — trash cans are nearly impossible to find. So where does all the garbage go? 1:Japanese people simply take their trash home. It's not a rule — it's a deeply rooted habit taught from childhood.2: In the 1990s, public trash cans were removed after a terrorist attack on the Tokyo subway. The city adapted — and never went back.