Riichiro Inagaki (born in Tokyo, June 20, 1976) is a Japanese manga author associated with Shonen Jump.
While not an artist, Inagaki has worked as the writer for Eyeshield 21 with artist Yusuke Murata, and Dr. STONE with Boichi. Before working in Eyeshield 21, he worked in three one-shots as a manga writer in different magazines until he found success in Weekly Shonen Jump.
His works include, in chronological order:
- Nandodemo Roku Gatsu Jū San Hi (2001)
- Square Freeze (2001)
- Love Love Santa (2001)
- Eyeshield 21 (with Yusuke Murata, 2002–2009)
- Kiba&Kiba (with Bonjae; 2010)
- Shinpai Kato No Face (with Katsunori Matsui, 2011)
- Alpha Centauri Zoo (with Katsunori Matsui, 2014)
- Kobushi Zamurai (with Ryoichi Ikegami, 2015)
- Dr. STONE (with Boichi, 2017–2022)
