Nittle Grasper is a fictional band that is in the anime Gravitation, by Maki Murakami. Vocals for the anime group's three songs are provided by three different groups/individuals, including Iceman, K.ITO + D.K ( also known as The Seeker), and (Ryuuichi's voice actor) Yamaguchi Kappei.

Line-up Names given in English style, family name last:
Ryuichi Sakuma = Vocals
Touma Seguchi = Keyboards
Noriko Ukai = Keyboards

Their songs include "Sleepless Beauty", "Shining Collection", and "Predilection". The first only appears in the anime, while the second is only in the OAVs, and the third is only in the drama CDs. Other songs have been credited to them thanks in part to the musical score written by keyboardist and composer Daisuke Asakura, who was not only the inspiration for Tohma, but also a member of Iceman, and producer for The Seeker, Kotani Kinya, and Yamaguchi Kappei among others. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.