Hatsune Miku
, sometimes referred to as Miku Hatsune, is the name of a Vocaloid software voicebank developed by Crypton Future Media and its official moe anthropomorph, a 16-year-old girl with long, turquoise twintails. She uses Yamaha Corporation's Vocaloid 2, Vocaloid 3, and Vocaloid 4 singing synthesizing technologies. She also uses Crypton Future Media's Piapro Studio, a singing synthesizer VSTi Plugin. She was the second Vocaloid sold using the Vocaloid 2 engine and the first Japanese Vocaloid to use the Japanese version of the Vocaloid 2 engine. Her voice is modeled from Japanese voice actress Saki Fujita. Miku's personification has been marketed as a virtual idol and has performed at concerts onstage as an animated projection (rear cast projection on a specially coated glass screen).
MikuMikuDance
The software was released as freeware. The models of the Vocaloid mascot series provided with the software are subject to the PiaPro Character License, and are not allowed to be used without permission for commercial reasons. Although the software is distributed freely, models released independently of the software may not be — original produced models, motion data, and landscapes may be subject to their creator's own rules. The program does not standardly include all of the Vocaloid characters, but it includes Hatsune Miku, Kagamine Rin, Kagamine Len, Kaito, Meiko, and Megurine Luka; and although Yowane Haku and Akita Neru are not official Vocaloids, they became so popular that Crypton officially licensed and added them to .