Hirakata T-Site, Osaka
Located halfway between Kyoto and Osaka, the stunning eight-storey Hirakata T-Site looks like a series of glass boxes stacked on top of each other. While it is more of a shopping complex than a library, the gorgeous space is centered around the Tsutaya Bookstore, which features a lofty atrium with towering 7m-high walls lined with books.
There are two of these impressive book walls on the fifth floor, and they have become an Instagram hit. The calming space is made more beautiful by the natural light seeping in from the floor-to-ceiling picture windows.