From what I see joked about in tv and film: toilets.
From what I know from people who have actually been there personally: Vending machines.
Also they have the most advanced KitKat flavors in the world. I want them. But they’re like specialities of specific regions kinda like Pokemon. It’s wild.
I just heard a news story about a store’s toilet exploding and covering a dude in shit (who is now suing). I can’t help but think this is that very bathroom after they were taken to court.