Kasane Teto

Kasane Teto
Developer(s)
  • TwinDrill
  • AH-Software Co. Ltd.
Initial release1 April 2008 (2008-04-01)
Stable release
Kasane Teto AI ver 104 / 3 April 2023 (2023-04-03)
Engines
  • Utau
  • Synthesizer V AI
  • VOICEPEAK
Available in
  • Japanese
  • English
TypeSinging voice synthesiser
Websitekasaneteto.jp

Kasane Teto (Japanese: 重音テト) is an Utau 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 2chan. 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.[1] The rights holders created the group TwinDrill in 2009 to promote the character. TwinDrill agreed to make Crypton Future Media the future point of contact for commercial use.

Throughout the 2010s, Kasane Teto had more songs released, and a DLC appearance in Hatsune Miku: Project DIVA F.[2] 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.[3][1]

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

Despite not being a Vocaloid, Kasane Teto has gained popularity among Vocaloid fans.[4] Music Awards Japan 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.[5]

Notable songs

Charted songs with vocals by Kasane Teto
Title Artist Year Peak chart positions YouTube Views Sources
JPN
Hot
JPN
Niconico Vocaloid
"Override" Yoshida Yasei 2023 75 1 78M [6][1]
"Mesmerizer" Satsuki / 32ki 2024 65 1 147M [7][8]
"Tetoris" Hiiragi Magnetite 35 1 78M [9][10]
Kasane Teto songs with awards and nominations
Awards Category Song Artist Year Result Sources
2025 Music Awards Japan Best Vocaloid Culture Song "Override" Yoshida Yasei 2023 Nominated [5][11]
"Medicine" ("Igaku") Sasuke Haraguchi 2024
"Mesmerizer" Satsuki / 32ki
"Tetoris" Hiiragi Magnetite

References

  1. 1.0 1.1 1.2 "Japan's Vocaloid Scene: Top Trend for the First Half of 2024 Is 'Room for Interpretation'". Billboard. Penske Media Corporation. 13 September 2024. Retrieved 31 August 2025.
  2. Sahdev, Ishaan (6 November 2012). "Hatsune Miku: Project Diva f DLC Adds "Unofficial" Vocaloids Neru, Haku And Teto". Siliconera. Retrieved 31 August 2025.
  3. Bueno, Daniel (4 April 2023). "Kasane Teto Synthesizer V Vocaloid Voice Arrives in April". Siliconera. Retrieved 31 August 2025.
  4. Le 2013, p. 5.
  5. 5.0 5.1 "MUSIC AWARDS JAPAN's Best Vocaloid Culture Song Entries Highlight Different Domestic & International Trends". Billboard. 22 April 2025. Retrieved 3 May 2025.
  6. "Yoshida Yasei Chart History on Billboard Japan". Billboard Japan. Retrieved 30 January 2025.
  7. "32ki Chart History on Billboard Japan". Billboard Japan. Retrieved 30 January 2025.
  8. "ニコニコ VOCALOID SONGS TOP20" [Niconico Vocaloid Songs Top 20]. Billboard Japan (in Japanese). Hanshin Contents Link Corporation. 13 May 2024.
  9. "Hiiragi Magnetite Chart History on Billboard Japan". Billboard Japan. Retrieved 30 January 2025.
  10. "ニコニコ VOCALOID SONGS TOP20" [Niconico Vocaloid Songs Top 20]. Billboard Japan (in Japanese). Hanshin Contents Link Corporation. 13 November 2024.
  11. "Winners for "MUSIC AWARDS JAPAN 2025" 1st Day Announced". NanteJapan. Retrieved 11 June 2025.

Sources

Other websites