Hatsune Miku
Hatsune Miku was the first Vocaloid developed by Crypton Future Media after they handled the release of the Yamaha vocal Meiko and Kaito. The name of "Hatsune Miku" was conceived soon after the Vocaloid 2 announcements, when an English and Japanese vocal were developed for the character. The intended design was delayed and later used for Megurine Luka instead. Miku was intended to be the first of a series of Vocaloids called the ""Character Vocal Series"", which included Kagamine Rin/Len and Megurine Luka. Each had a particular concept and vocal direction.
Zoome
zoome's popularity boomed via Hatsune Miku at the end of 2007. Nico Nico Douga, the fostering site of the voice synthesis software, became involved in a scandal which caused some of its members to move to zoome. Dwango, the owner of Nico Nico Douga, had registered the copyright of a Hatsune Miku song to the copyright management group JASRAC under the name "Dwango", without permission from the song's author, sparking outrage among Vocaloid fans. Sometime before the scandal broke out, ACCA had opened a Vocaloid video hosting circle , which was officially recognized by Hatsune Miku's developer, Crypton Future Media. The scandal on Nico Nico Douga and the official recognition in zoome lured many members away from Nico Nico Douga to zoome. As a result, Hatsune Miku videos became one of the mainstays of zoome, and zoome became a leading competitor able to challenge Nico Nico Douga's monopoly of the video hosting service industry in Japan.