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Capsule Inn Osaka
Osaka, Japan
Most histories of the format start at this address. Capsule Inn Osaka opened in Umeda in 1979 and is generally credited as the first capsule hotel anywhere.
The original capsules were designed by the architect Kisho Kurokawa, the Metabolist behind the Nakagin Capsule Tower in Tokyo. The concept he set out is still the one most capsule hotels follow: stacked fibreglass berths, a locker downstairs, and baths and lounges shared.
It works as a traditional capsule hotel rather than a design showpiece. Check which guests it admits before booking, as older capsule hotels often operate single-gender floors or buildings.