I've Sound

I've Sound, or simply called I've, is a Japanese techno/trance music production group based in Sapporo, Hokkaido, Japan. Led by Takase Kazuya, it features the talents of seasoned "sound creators" and many different female vocalists, known as utahime (歌姫) to their fans.

From url=http://anidb.net/cr3896AniDB

I've Sound is also a brand of Visual Art's.

Their current members include, alongside Takase Kazuya:
~C.G Mix (composer/singer)
~Maisaki Nami (composer)
~Satou Asuka (singer)
~RINA (singer)
~IKU (singer)
~Iuchi Maiko (partnership)
~Nakazawa Tomoyuki (partnership)
~Kawada Mami (partnership)
~marriage blue (partnership)