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(Japanese: 重音テト - かさねてと - Kasane Teto)
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.
TYPE: BOUCALOID (in Japanese, 某CALOID) - 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.
MODEL: 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.
GENDER Chimera (Visually and by human standards a female) VOICE RANGE A3-E5 @ 70-150 bpm RELATED CHARACTERS Ted Kasane (elder brother, male counterpart by pitch manipulation)
Defoko (friend)
Momo Momone (friend)
Luna Amane (colleague)
Ruko Yokune (fellow vip@2ch product)
Ritsu Namine (fellow vip@2ch product)
Tei Sukone (fellow vip@2ch product)
AGE 31
(Official age)
(Fan description as human age)
GENRE Pop Music and Anison HOMEPAGE Official Website
Kasane Teto Wiki
Caution: the YouTube channel "TheOfficialTeto" is a plagiarizer. Please do not leave messages "hi Teto" or so on.
WEIGHT 103 lbs (47 kg) CHARACTER ITEM French Bread CREATOR Sen (線) (illustrator)
HEIGHT / MEASUREMENTS 5'2" ft (159.5 cm) /
B: 28.74 in (73 cm)
W: 21.25 in (54 cm)
H: 34.64 in (88 cm)
VOICE SOURCE 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. PICTURE LINK LIST CONCEPT ART, BOX ART, ALTERNATE BOX ART, PIAPRO, PIXIV, DEVIANT ART, GELBOORU, GOOGLE IMAGE, PHOTOBUCKET
BIRTHDAY April 1, 1994 (following human age) LIKES French Bread, playing tricks MEDIA LIST NICO NICO DOUGA, YOUTUBE
RELEASE DATE April 1, 2008 DISLIKES DMC (Abbrev of Detroit Metal City, a gag strip)
rats (her dislike/fear of rats also has its roots from Doraemon.)
SIGNATURE SONGS Song of Eared Robot,
Fake Diva,
Kasane Territory
PERSONALITY: 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 dragon 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.

Supplemental Information


Kasane Teto depicted in her Chimera form

Hair color: Red (or pink) hair with drill locks on both sides. She also has an Ahoge (sticking up hair;cowlick).
Headgear: Headphones
Eye color: Blood red, and on some occasions Fuchsia or Dark Pink.
Headphones: Purple headset with red illumination.
Dress: 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.
Nationality/Race: Chimera, the hybrid of human and bat in her case, and by human standpoint Japanese.
Favorite phrase: Kimi wa jitsu ni baka dana (君は実にばかだな; You are indeed stupid). This phrase was originally addressed to those who thought that Teto was a genuine Vocaloid in vip@2ch.

Voice Configuration

Teto is designed for Japanese language only. She does not have phonemes for other languages, though some can be improvised, but with rough results. Her voice data is written in Kana, so Western users must convert the filenames into Romaji first before using her. Some have tried to make her sing in other foreign languages such as English.

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.

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).

Usage Clause

Teto Kasane 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.





Popular Appearances

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.

  1. 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) page found here , another labeled with her name in default Katakana, "重音テト" page found here ; she appears with Haku Yowane in another chapter.

Combined with Defoko (Uta) and Momo, 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 the official appearance on Project DIVA.


Piapro, which is operated by Crypton, now accepts Teto's illustrations. To clear up the issues related to copyright, users are encouraged to post the illustrations onto the site (need to create your account), and Piapro and TWIN DRILL, the official association of Teto, give approval to the NON-COMMERCIAL use of these creations automatically when uploaded. To utilize this arrangement, users need to link the posts to the main illustration here. The procedure is as follows: Click "創作ツリー" and a new window opens; paste the URL of the main illustration in the box "元になった作品のピアプロURLを追加して下さい。", then click "親作品を追加する".

Information in this page is certified true and correct by Damesukekun, UTAU Wiki Sysop and a member of the Team Twindrill, Teto's production outfit. Changes may occur anytime without prior notice. If any further edit needed, leave your message on the talk page.