Kasane Teto

Kasane Teto () is an  virtual singer software (voicebank). She was originally created on 1 April 2008 as a parody of Hatsune Miku. The voicebank for the character was later made. Since then, Teto has become popular among Vocaloid fans.

History
Kasane Teto started as an April Fools 2008 joke on Japanese internet forum . The software was a parody of Hatsune Miku, but was later made compatible with the voice synth software UTAU. Voice actress Mayo Oyamano provided voice samples for Teto. The rights holders created the group TwinDrill in 2009 to promote the character. TwinDrill agreed to make  the future point of contact for commercial use.

Throughout the 2010s, Kasane Teto had more songs released, and a DLC appearance in . For the 15th anniversary on 1 April 2023, AH-Software Co. Ltd. announced the Synthesizer V AI version of Teto. This voicebank was later released on 27 April 2023.

Character
Kasane Teto is a 31 year old, often seen as female due to her clothes and voice. However the community regard her as a "chimera".

 Reception 
200px|thumb|Cosplay of Kasane Teto
Despite not being a Vocaloid, Kasane Teto has gained popularity among Vocaloid fans.  reported in 2025 that five of the ten most popular Vocaloid songs in Japan featured Teto. This number is more than three other songs Hatsune Miku is featured in. Teto is also reported to be the second most used voice behind Miku.

Notable songs
+ Charted songs with vocals by Kasane Teto Title Artist Year Peak chart positionsYouTube Views Sources   "Override" Yoshida Yasei 2023 75 178M  ""  Satsuki / 32ki 2024 65 1147M  "Tetoris"  35 178M 

+ Kasane Teto songs with awards and nominations Awards Category Song Artist Year Result SourcesBest Vocaloid Culture Song "Override" Yoshida Yasei 2023Nominated "Medicine" ("Igaku") Sasuke Haraguchi2024 "Mesmerizer" Satsuki / 32ki "Tetoris" Hiiragi Magnetite

 References 

 Sources 




 Other websites 


Category:Fictional characters introduced in 2008
Category:Japanese singers
Category:Music software
Category:Japanese idols