Don Quijote stores are way fun. They’re pretty much open 24 hours (the one in Ikebukuro closes at 6 and opens at 10), and you can go there not wanting to buy anything, but just to browse the wacky selections of things on sale. Me and Yuko sometimes go there at 1-2am when we want to take a little walk outside. I often end up buying a can of A&W root beer, and Yuko spends most of her time in the makeup/perfume area. Read more about the chain in this article from THE JAPAN TIMES.