First Cabin Haneda Terminal 1
Tokyo, Japan
Built inside an airport terminal, this is a capsule hotel that borrowed its vocabulary from aviation rather than from dormitories. Accommodation is sold as cabins rather than rooms — compact partitioned units with a proper mattress, a lockable luggage space and a roll-down screen instead of a door — and the larger grades give you enough headroom to stand and dress without choreography.
The appeal is entirely practical and the hotel knows it. Guests are people on early departures, late arrivals and long layovers, so the operation is organised around silence, luggage and a large shared bath where you can wash off a flight properly. Staff handle a constant churn of short stays with unhurried politeness, and the building's single greatest amenity is that it is a few minutes' walk from a departure gate.