Outside Garbage Prohibited (コンビニのゴミ箱ルール - Gomi)
The strict Shinto/civilized rules for separating waste inside convenience store bins, including a strict zero-tolerance taboo on dumping bulky household garbage ('outside trash').
Street garbage bins are incredibly rare in Japan, so stores provide sorting bins as a service. Because tourists abused this by dumping giant home waste bags, bins are strictly restricted to trash generated inside Soya's shop.
Sort Soya's trash: split paper cups into 'Burnable', plastic wrappers into 'Plastic', and sodas into 'Cans/Bottles'. Never carry outside hotel/train trash into Soya's store bins; doing so is considered illegal dumping.
What is considered a severe etiquette taboo and potential illegal act when using convenience store trash bins?