Tokyo, Japan
First Cabin Haneda Terminal 1
Cabin-class sleeping inside an airport terminal.
First Cabin borrows its vocabulary from aircraft: cabins rather than capsules, sold as business or first class, with the difference being floor area rather than anything else. This branch sits inside Haneda's Terminal 1, past the shops and before the gates.
Cabins are tall enough to stand in and closed with a shutter, so they read as small rooms without the acoustic privacy of one.
Large shared baths sit on the same floor, and the airport's first departures explain most of the check-in times.