Book and Bed Tokyo
Tokyo, Japan — bookshelf berths above the street
The conceit is simple enough to explain in a sentence: the sleeping berths are built into the back of a working bookshelf, so guests climb through the library to get to bed. It reads as a gimmick until you stay in one, at which point the arrangement turns out to solve the capsule hotel's oldest problem, which is that there is nowhere pleasant to be between checking in and falling asleep. 1
Berths come in two depths, both sealed by a blind rather than a door, with a reading light and a socket and nothing else. Washing is communal and well maintained. The common floor is the actual product — several thousand volumes, low seating, long opening hours — and it is why the property tends to hold guests for more of the evening than a conventional capsule house does.