Livetune is a Japanese music group which formed in 2007 as a dōjin music group signed to Toy's Factory. The band originally consisted of two members, Kz and Kajuki P, but Kajuki P left the group in March 2009. Livetune started out by making use of the Hatsune Miku singing synthesizer to produce vocals for songs submitted to the Nico Nico Douga video sharing website. The popularity of the songs led the group to release the independent album Re:package at Comiket 73 in December 2007. Livetune made its major debut with Victor Entertainment with the professional release of their Re:package album in August 2008, which was updated with more songs. A remix album followed in March 2009 titled Re:Mikus, containing remixed songs from Re:package. Livetune released its first single "Kotchi Muite Baby/Yellow" in July 2010 as a split single with fellow dōjin musician Ryo of Supercell. Kz composed the song "Irony" sung by ClariS, which was used as the opening theme song to the anime series Ore no Imōto ga Konna ni Kawaii Wake ga Nai.
Kz (pronounced "K-Zet") (music, lyrics)
Following the release of the Vocaloid 2 singing synthesizer software Hatsune Miku on August 31, 2007, Kz submitted a short version of the song "Packaged" to the Nico Nico Douga video sharing website on September 21, 2007 using Miku for the vocals. The full version was submitted on September 24, 2007 and has since been viewed over 1 million times. The song was also posted on the Muzie music sharing website. Kajuki P released the song "Shooting Star" (シューティング☆スター?) on September 23, 2007. Kz and Kajuki P continued to release songs online, leading to the release of their album Re:package at Comiket 73 in December 2007. Re:package contained their previously released songs in addition to several previously unreleased songs. The album was so popular that it was reported to sell out in a flash.
Livetune made their major debut with Victor Entertainment with the professional release of their Re:package album on August 27, 2008. The updated release contained three more songs than the original, as well as the full version of "Over16bit!" and an updated version of "Packaged (piano ver.)". he album obtained a No. 5 ranking on Oricon's weekly albums chart after selling over 20,000 copies in its first week. Livetune released the remix album Re:Mikus on March 25, 2009 under Victor Entertainment, which contained remixed song from R:package, as well as four additional songs. Kajuki P left Livetune in March 2009. Kz collaborated with manga artist Masami Yuki to produce the concept album Crosslight released on August 26, 2009 containing tracks sung by Hatsune Miku and Vocaloid 2 Gumi.
Livetune's first single "Kotchi Muite Baby/Yellow" (こっち向いて Baby/Yellow?) is a split single with fellow dōjin musician Ryo of Supercell; both songs are theme songs to the video game Hatsune Miku: Project Diva 2nd. The single was released by Sony Music Direct on July 14, 2010 in Japan. Kz composed the song "Irony" sung by ClariS, which was used as the opening theme song to the anime series Ore no Imōto ga Konna ni Kawaii Wake ga Nai; the single for "Irony" was released on October 20, 2010.
In late 2010, Shibuya, Tokyo-based company INCS toenter established the major record label TamStar Records for musicians and artists who originally made their debut as dōjin music artists online. Livetune joined the label as one of the inaugural members, including others such as Supercell, Gom, Rapbit, and Nagi Yanagi. Livetune collaborated on a compilation album titled TamStar Records Collection Vol. 0 released as a limited edition at Comiket 79 in December 2010. Kz again collaborated with ClariS by composing their third single "Nexus", which was released on September 14, 2011. Kz composed the song "-Mirai-Ressha-" (☆-未来-列車-☆?) for Kotoko, which appeared on her 2011 album Hiraku Uchuu Pocket. Kz later collaborated with Kotoko on the song "Love 0 Jetcoaster" on Maon Kurosaki's 2011 album Butterfly Effect; Kz composed the song, and Kotoko wrote the lyrics. Kz composed the songs "New World" and "Stand Up" sung by Twill; both songs are used as opening themes to the anime Digimon Xros Wars.
In 2012, Livetune left Victor Entertainment and transferred to the record label Toy's Factory. Livetune released the single "Tell Your World" on January 18, 2012 as a digital release online in the iTunes Store available in 217 countries. An EP titled Tell Your World EP will be released on March 14, 2012.