Who Is Kasane Teto? The April Fools Joke That Became An Early Internet Icon

Kasane Teto is a virtual singer character associated with the UTAU singing synthesizer software. Created in 2008 as part of an April Fools’ joke parodying a new Vocaloid release, the character quickly gained popularity within online music and anime communities. Although initially developed as a UTAU voicebank, Teto was later officially released for the Synthesizer V AI engine in 2023, leading to a renewed wave of fan-created music videos and online content featuring the character.