Aisenshi (哀旋士) is a Japanese speed metal band formed in 2013 by Eizo Sakamoto and She-Ja. It serves as a spiritual successor to their previous project Animetal. Sakamoto claims that the spirit of what "Animetal" comprised has not died, but has since become more soulful and sorrowful, with the anime theme song covers they will perform now having such a tone to them. Their debut album under "Aisenshi", which borrows its name from the Mobile Suit Gundam film Soldiers of Sorrow, is titled Heartstrings and was released on June 5, 2013. The band's members, aside from Sakamoto on vocals and She-Ja on guitar, include Gusty Bombs' bassist HIRO, Animetal's former drummer Katsuji, and Juhki from the dōjin music circle "IRON ATTACK!".