[CydeWeys]

I'm just leaving Japan after spending a week touring around the country, and I definitely did see litter. Not as much on the streets as in the US, but still some, and the beach was absolutely jam-packed with litter that had washed ashore.

Litter is inevitable. A lot or the time it isn't even conscious. You can just forget that you had set a bottle down next to you, and happen not to look back when you're leaving. Or it can fall out of your pocket or backpack unnoticed when you're retrieving something else. Or the wind can just blow it out of a trash can or vehicle.