Otori Kohaku (大鳥こはく), also known as Unity-chan (ユニティちゃん), is a Japanese VOCALOID that was released for "Unity with VOCALOID", which is distributed by Unity Technologies Japan and uses the VOCALOID2 engine. She was released for the VOCALOID4 engine in January 2016, developed and distributed by the YAMAHA corporation.

She is voiced by a Japanese amateur voice actress, Asuka Kakumoto (角元明日香 Kakumoto Asuka).


Kohaku was born on August 13 and her bloodtype is AO.

According to the biography on the character's website, Kohaku is the only daughter of Otori Yuuji, who is the CEO of a company called Otori Orchestra. She dreams to be in action video games and movies. Her favorite food is curry croquette.[1]

VOCALOID itself resulted in the growth of Kohaku's character. Despite being the voice actress of Kohaku for a while, Asuka Kakumoto had no experience in anything other than speaking roles. The development of the VOCALOID vocal lead to her first "singing" role and the singing voice of Kohaku had to be experimented with for the first time. This pushed Kakumoto's voice further than it had ever gone before.


She originally appeared with the outfit used for Candy Rock Star, a 3D "live performance" using Unity technology. In the Candy Rock Star video, she performed "UNITE IN THE SKY!" a song featuring her voice provider singing as Kohaku. The "Unity-Chan" voice was used to filled the role of AKAZA, a second voice for the song.[2]

Her original debut outfit consisted of a blue long-sleeved shirt with a brown and orange vest over it. The vest had orange checkers on the side with the word "Unity" under it. She also had orange striped thigh high socks and black shoes. Her hair was split into a type of twin tail style.

Her VOCALOID design was a twist on her original debut outfit, but with major changes. The presence of both her and AKAZA was meant to be a note of the overlap of the vocals between the real actress' own vocals and the voice created by VOCALOID despite being the same vocal.

In all of her designs, she wears her signature black headband with long orange ribbons attached.


  • AKAZA: Shares the same voicebank
  • Otori Yuuji: Father
  • Kanbayashi Yuko: Schoolmate
  • Fujiwara Misaki: Schoolmate

Music featuring Otori KohakuEdit

  • Otori Kohaku is featured in 2 songs and 0 albums on this wiki.
  • There are listings for notable, original, and cover songs.

Examples of usage

Featuring Otori Kohaku
Producers なおとK
Category Cover song
Romaji/English Kashokusei: Idol Shoukougun / Indulging: Idol Syndrome
Featuring Otori Kohaku, Rana V4
Producers JorroTreul (tuning, mixing, mastering), Lucifer (VSQx)
Category Cover song
Featuring Otori Kohaku
Producers Freeze (music, lyrics), テラバイト☆ゆういち (video)
Category Original song
閉ざした目の 奥に描く夢は
Romaji/English Tozashita Me no Oku ni Egaku Yume wa
Featuring Otori Kohaku
Producers kadotanimitsuru
Category Cover song
Search for music featuring Otori Kohaku [show/hide]

Additional InformationEdit


Originally, assets for her were downloadable for free to work with the Japanese version of the Unity engine. This proved a popular move with developers using the product.

Her license was set to be modified in line with her Vocaloid release. For use of her voicebank within projects, for the non-upfront cost of 10 million Yen the voice will be provided (10 million is the consultation cost) with no additional charges. For other public use of the voicebank, a Vocaloid engine fee will have to be paid. This is due to the Yamaha royal system, and users will have to seek consultation with 3rd parties for use with Vocaloid and other company's vocals (example Crypton Future Media, Inc. and Hatsune Miku).[3]


Otori Kohaku's character status
  • First VOCALOID for Unity with VOCALOID


Do you like Otori Kohaku?

The poll was created at 21:31 on January 14, 2016, and so far 212 people voted.
What characteristic of Otori Kohaku do you like?

The poll was created at 21:31 on January 14, 2016, and so far 190 people voted.


Otori Kohaku 300x172
The image gallery for Otori Kohaku may be viewed here.


  1. link
  2. link
  3. link

External linksEdit

Japanese UNITY-CHAN! Official website for Unity-chan Link
Japanese unity-chan!@夏休みなう @UnityChan_PR The official Twitter account for VOCALOID UnityChan. Link
English deviantArt , art and media community Link
Japanese Pixiv , art and media community Link


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