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Globally, Shirao (Shirao , Кая ) is a very rare gender-neutral forename. The first name Shirao is characteristic of Bulgaria, where it is a rare masculine name, Kyrgyzstan, and Kazakhstan, where it is a rare mostly boy's, but uncommonly female name. Also, Shirao is the last name as well as the forename.
Shirao is also a name for the fictitious and mythical characters: Каја , character in Čedomir Ilić: a novel and Kaja , the protagonist in Erik Poppe's "U – July 22".