Masaaki Endoh is a Japanese singer-songwriter who is prominent in the area of soundtracks for anime and tokusatsu productions. He is one of the founders of the Anison band JAM Project and has been a regular member ever since its inception in 2000. His nickname is the "Young Lion of Anison" and he goes by the motto "Always Full Voice".
Endoh took the industry by storm when he released the two Enson albums and the subsequent third, in which he covered many famous anime theme songs. Due to their success, Endoh went on to sing signature songs with the respective artists, such as "Arashi no Naka de Kagayaite" with Chihiro Yonekura, "Sousei no Aquarion" with Akino, "Butter-Fly" with Kōji Wada, "Bakuryū Sentai Abaranger" with Hideyuki Takahashi from Project.R, "Eternal Blaze" with Nana Mizuki, "Yuzurenai Negai" with Naomi Tamura, "Pegasus Fantasy" with NoB, "Makka na Chikai" with Yoshiki Fukuyama, "Kimi Taiyou ga Shinda Hi" with Maon Kurosaki, "SERIOUS-AGE" with Faylan, "We Are" with Hiroshi Kitadani, "KINGS" with Angela, "DREAM SOLISTER" with True, and "UNINSTALL" with Chiaki Ishikawa.