I do remember very well the comic characters that used to reside inside the capsule shaped rooms. I think Japanese architects have got inspiration from their dwelling style that's why they have introduced strange looking Capsule Hotel that accumulates all facilities inside the shell that can be managed sleeping on the bed.

The capsule unit is made of stout plastic and designed I shape of jet's cockpit that provide you facilities like TV, radio, light system, alarm click, etc etc.
Via: cynical-c