Kimi wa jitsu ni baka dana
—Favorite phrase[1]

Kasane Teto (重音テト (かさねてと)) is a voicebank for the UTAU and UTAU-Synth program.


Combined with Uta Utane and Momo Momone, they are often referred to as "The 3 UTAU Girls." This is due to the fact that they were the first 3 UTAUloids to be publicly released.

On October 10, 2011 Teto made a official appearance on Project DIVA.


Depicted as more innocent than Miku Hatsune is. Teto is cheerful and eager, though may be naughty at times, perhaps inspired by her mischievous roots from Doraemon. Depicted also as a Tsundere (a mannerism that feigns disinterest to people she is attracted to), but to a more gentler extent, unlike Neru Akita. She hates people who think her pigtails are actually drills. She also can be narcissistic at times and loves getting attention. She gets very angry or sad if someone has bread and does not share with her. Teto enjoys teasing people just to show she cares about them since she doesn't want to show her love. She can get out of control if not eaten bread for one day. There are also persisting rumors of Teto's Chimera alter-ego, giving her wings and a tail. She may or not be aware of her own Chimera form. As for her other skills, she can whip up tricks to extend DVD rentals, and her favorite country is Norway.

Her character is said to be French Bread, she likes French Bread and playing tricks, she dislikes DMC (Abbrev of Detroit Metal City, a gag strip)[2] and rats; the fear of rats also has its roots from Doraemon.


  • 重音 - Kasane; Multiple meaning "Piled-up Sound," "Double Sound," "Heavy Sound."
  • テト - Teto; Shortened from Tetopettenson, a parody song of Le Beau Tambour.
  • 某CALOID - BOUCALOID; Roughly translated as Vo-kinda. This is a play on words. 某caloid has the same pronunciation as Vocaloid in Japanese, and means "so-and-so-caloid," i.e., a fake Vocaloid for an April Fool's joke.
  • 0401 - Initially introduced as 04 following Miku, Rin and Len under the parody name Crvipton. After the fake "new Vocaloid release" trolling, the number was changed to April 1, or April Fools Day, her release date.


  • Hair color - Red (or pink) hair with drill locks on both sides. She also has an Ahoge (sticking up hair;cowlick)
  • Headgear - Purple headphones.
  • Eye color - Blood red, and on some occasions Fuchsia or Dark Pink.
  • Earphones - Purple headset with red illumination.
  • Outfit - Dark gray outfit with red or pink trimmings and highlights. See concept art for details. Also her side chain is fastened inside her skirt. Some depictions describe this chain as her "tail" and sometimes move on its own volition


Product Information

Product Information
  Genre: Pop Music and Anison  Tempo: 70-150 BPM  Range: A3-E5
  Input: Kana encoded and Kana aliased  Vowels: CV, VCV, and CV VC English  System: Microsoft Windows
Package details as noted:
  • This voicebank was recorded for the Japanese and English language.
  • Some appends are also available. They are 巻き舌音源 (trilling R consonant), 語尾息音源 (breath noise ending) and 囁き音源 (whisper voice).
Vocal traits as noted:
  • Teto's voicebank has seen revisions; first, the original release, the second being teto-02, and a new version, teto-03 alpha. Ameya, the author of UTAU, is reportedly involved in the tuning of Teto's voicebank, and teto-03 alpha is seeing regular use due to the improved quality over the previous versions. However, it is still in Kana, but experiments for non-Japanese vocalizations has seen some better potential for English.
  • Later, Kasane Teto's VB had gone onto her official site. Since that, two packages had been released: the "Tougou full, CV/VCV" and the "Tandoku lite, CV only" version. These two versions are seen updates regularly.
Software issues as noted:
  • Work in Progress
Voicebank sample

Work in Progress - [[<File:Audio.ogg>]] or Link_hosting_service

Additional information

Terms of Usage

Kasane Teto has a governing policy imposed by the author in regards to usage of both the voicebank and the character. The English translation is provided by the author.


Work in Progress


  • Her phrase was originally addressed to those who thought that she was a genuine Vocaloid in vip@2ch.
  • Mayo Oyamano (小山乃 舞世) aka. Yamanon, introduced as "Nobuyo Oyama (小山 乃舞世) at first, a parody of Nobuyo Ōyama (大山 のぶ代), former voice actress for the character Doraemon. Then the name was changed to this reading to avoid confusion.
  • The YouTube channel "TheOfficialTeto" is a plagiarizer. Please do not leave messages "hi Teto" or so on.


Teto is immensely popular in Piapro, which is operated by Crypton Future Media. She is also featured in plenty of Vocaloid-related songs, despite the difference of platforms.

She appears in the Hatsune Mix manga by KEI. She is shown on two bottles of MEIKO's sake: one labeled "重音てと" (Kasane Teto), another labeled with her name in default Katakana, "重音テト"; she appears with Yowane Haku in another chapter.



  1. "You are indeed stupid."

External links