Japan's Capsule Hotels
This particular Capsule Hotel is located near Kabukicho (red light district) in the Shinjuku area of Tokyo. It allows only men. It cost Y3,800 for the "room" and bath. Massages are available for an additional Y3,300 for 40 minutes. It's on the 6th floor of a building and is called Big Lemon. It's open 24 hours and you can leave and come back as you wish.
They speak a little English and foreigners are welcome. You can store your luggage behind the counter. You pay at a vending machine and hand the ticket to the clerk. They give you a capsule number and locker key and wrist band. When you are in for the night, you change in the locker room and wear the small yukata around the facility.
Check out the [Capsule Hotel], more pictures over [Fundumper]