IDK man, I was just there for 2 weeks in Kobe, Osaka, Kyoto, and Tokyo, and there were so few publicly accessible trashcans that I started considering photographing the handful I saw (2-3 next to drink vending machines, and one (1) large one in Shinjuku's main luxury-tourism thoroughfare) for their shiny rarity. At one point we were joined by our third member, and we warned them first thing "there are no trash cans in Japan!" and sure enough, about 2 hours later, they were clutching an empty beverage, looking around futilely for somewhere to throw it out...