ika is the author best known for producing "Miku Miku ni Shite Ageru," which was the #1 song in the initial Vocaloid Weekly Ranking and remained on the charts for an extended period of time, getting the most view counts in the history of a Nico Nico Douga video at a certain point. This work set a model of the personification of Vocaloids and inspired many succeeding producers.
ika, however, was dragged into problems related to the copyright of Vocaloid music at the end of 2007, and left Nico Nico Douga with only three Vocaloid videos.
Nothing had been heard of this creator since then, but on February of 2010 he disclosed himself as the professional lyricist Kamo Tsuruta (鶴田 加茂 Tsuruta Kamo), who was writing lyrics for MOSAIC.WAV since February of 2008.
On October 07, 2012 he released a revised version of his trademark song, "Miku Miku ni Shite Ageru". In just two days it was able to gain over 300,000 views.