Kasuga39, Hatsune Miku is not "Hatsune Miku". She is part in VOCALOID. Now, VOCALOID is a computer singing synthesizer which is produced by YAMAHA. Crypton Media had to be involved with the VOCALOIDS and SEGA as well. There now 3 VOCALOID generations, the 2 generation is the newest one this year. The first VOCALOID is English, Leon. But still, yes, Hatsune Miku is a singing synthesizer with the other VOCALOIDS as well. But just refer them as VOCALOID. This is just a piece of information for you to know.