Riichiro Inagaki (Japanese: ?? ???, Hepburn: Inagaki Riichiro, born June 20, 1976) is a Japanese manga writer from Tokyo.
He started his career in 2001 publishing works for Shogakukan's magazine Big Comic Spirits.
After three one-shots, he moved to Shueisha's Weekly Shonen Jump, in which he started the work he is best known for, Eyeshield 21.
In collaboration with the artist Yusuke Murata, Eyeshield 21 was serialized between July 2002 and June 2009 in Weekly Shonen Jump, and was later adapted into an anime television series.
Between 2010 and 2015, Inagaki collaborated with several artists, including Bonjae, Katsunori Matsui, and Ryoichi Ikegami, and published one-shots in different magazines.
He started a new serial titled Dr.
Stone in Weekly Shonen Jump in 2017 in collaboration with Boichi.