Hiyama Kiyoteru V4 - "Natural" + "Rock" package
|Developer(s)||AH-Software Co. Ltd.|
|Initial release||December 4, 2009|
Hiyama Kiyoteru V4 / October 29th, 2015
|Operating system||Windows, Mac|
|Type||Vocal Synthesizer Application|
He was released on the same day as Kaai Yuki and SF-A2 Miki with Kaai Yuki and he being released as "student" and "teacher" vocals. The voice who had been sampled for him had been secret for a time, however, Kiyoshi himself announced it on Nico Nico Live on August 12, 2010.
Silhouettes for the AH-Software Vocaloid 2 vocals were revealed on a poster on November 6, 2014; however, it was unconfirmed what they were for at the time. On November 20, it was confirmed in the livestream for Vocaloid 4 that they all, with the exception of Tohoku Zunko, would receive updated vocals for the new engine. Kiyoteru's new vocals were recorded from scratch to improve his upper and lower ranges. Kiyoteru was confirmed to receive a "Natural" and "Rock" vocal for his Vocaloid release, allowing him to make use of the cross-synthesis feature in Vocaloid 4.
In an interview, Tomohide Ogata expressed a desire to produce English versions of their Vocals, however, the project is too complex. He went on to explain that because all of their providers are Japanese, they would rather seek English speakers of a similar voice to the Japanese versions from the United States and United Kingdom.
Kiyoteru is a teacher who participates in a rock band called Ice Mountain on weekends, with the stage name "Ice Mountain Teru." He is also said to be good at mathematics. "Ice Mountain" were featured in a book of the same name, and all members were given biography details in relation to this. According to the book, the default configuration for his software package happens to be Kiyoteru's vocals as a rookie singer.
|Height||176 cm / 5 ft 9 in|
|Weight||59 kg / 130 lb|
|Suggested Tempo Range||60~160bpm (V2, Natural), 70 - 190bpm (Rock)|
|Suggested Vocal Range||C2 - G3 (V2), A1~C4 (Natural), C2~G4 (Rock)|
-  VOCALOID Blog - 出た！比山貴咏史氏が「氷山キヨテルの中の人」であることをカミングアウト (Coming out Ice Mountain Teru)
-  Himi Izutsu Official Web - 比山貴咏史（比山清） Kiyoshi Hiyama
-  IT Media News - コードネームは「勇馬」 ヤマハ純正のイケメンボカロ「VY2」の話を聞いてきた
- "AHSのおがた＠もすかう". Twitter. Retrieved 27 April 2016.
- "All V2 AH-Software Get Updates! - VocaloidOtaku.net Forums - Providing Everything Vocaloid - Page 23". Retrieved 27 April 2016.
- "VOCALOID - Spirits of Creators No.23 - Mr. Tomohide Ogata-... - Facebook". Retrieved 27 April 2016.
-  IT Media - 新人VOCALOID「ボカロ小学生」「ボカロ先生」「ボカロフルカワミキ」登場――さっそく歌ってもらった (1/2) (The new Vocaloids a Grade schooler, a teacher, and Furukawa Miki appear)