Definitions, etiquette, and what thousands of real guest reviews actually say about the capsule format — written by the same editors who score every hotel in the directory.

A working definition of the format Osaka invented in 1979 — what a pod actually is, what it costs, who it suits, and how it differs from a hostel dorm with curtains.

What the review evidence says about safety, women-only floors, and which properties are entirely female-only — with live counts from our directory.

The format works because everyone follows the same quiet contract. The rules nobody hands you at check-in — shoes, phones, alarms, plastic bags, and the 10 a.m. lockout.

Not all capsules are capsules. The three pod types we label on every listing, what each does to noise and privacy, and how to pick before you book.

The honest answer is a range, not a number. Where a capsule sits between a hostel bed and a budget hotel room, what moves the price, and how to judge whether a pod is worth it — with live numbers from our directory.

Landside or airside, hourly blocks or full nights, and why the nearest pod to the terminal is not always the right one. What the review evidence says about sleeping next to a runway.