Fictional entities
* The Kaiō, gods of the fictional ''Dragon Ball'' universe * The Kaiōshin, upper-level gods of the ''Dragon Ball'' universe * Michiru Kaioh, a central character of the ''Sailor Moon'' meta-series * Kaioh, a central antagonist in ''Fist of the North Star'' * Kaio, a monster and star system in the 2009 RPG video game '' Spectrobes: Origins''People
* Chōgorō Kaionji (1901–1977), Japanese author noted for historical fiction novels *Other uses
* KAIO (FM), a radio station (90.5 FM) licensed to serve Idaho Falls, Idaho, United States * KWKK, a radio station (100.9 FM) licensed to serve Russellville, Arkansas, United States, which held the call sign KAIO-FM from 1984 to 1990 * Atlantic Municipal Airport (ICAO code KAIO)See also
* Kayo (disambiguation) * Kajo (disambiguation) {{Disambiguation, callsign, airport, given name