Hiyama Kiyoteru (氷山キヨテル) is a Japanese VOCALOID developed and distributed by AH-Software Co. Ltd., and was initially released in December 2009. There is currently ongoing development upgrade to the VOCALOID4 engine. His voice is provided by Japanese male singer Kiyoshi Hiyama (比山貴咏史, Hiyama Kiyoshi).
Kiyoteru is a teacher who participates in a rock band called Ice Mountain on weekends, with the stage name "Ice Mountain Teru." According to the book Ice Mountain, the default configuration for his software package happens to be Kiyoteru's vocals as a rookie singer. He is also said to be good at mathematics.
His favourite microphones are also were given as:
BEHRINGER Ultravoice XM8500 (during his junior high and high school years)
He was, overall, the least popular of the AH-Software trio of VOCALOIDs. All three took a while to gain popularity, leaving him the least popular Japanese Vocaloid in Japan for some time.
An independent search on Nico Nico Douga revealed that most VOCALOIDs had less then 1,000 videos uploaded on Nico Nico Douga in 2011 between July 1st and December 15th; Kiyoteru fell into this category.
Yuki and Kiyoteru were announced in November 2009. Interestingly enough, at the end of the previous month, Crypton Future Media had just made their own announcement of a series called Project if... which was set in a elementary school setting.