初音階段 (Hatsune Kaidan) is a side project of the Japanese noise group Hijokaidan that utilizes Vocaloid software singer Hatsune Miku. The project started in 2013 following the Hijokaidan release "初音階段" under the name "非常階段 starring 初音ミク". For performances Miku was portrayed by Kamin Shirahata. On August 31, 2013, she retired and was replaced by LeChat (るしゃ). Read more on Last.fm