Ehoto Osogaguchi

is a Japanese professional shogi player ranked 4-dan.

Early life and amateur shogi Osogaguchi was born in Kumano, Mie, on October 22, 1999. Osogaguchi became interested in shogi after seeing is parents playing the game when he was four years old.

In May 2012, Osogaguchi won the inaugural J:COM Cup Sangatsu no Raion All-Japan children's shogi tournament as the representative of the Osaka area as a first-year junior high school student, so, he also decided to pursue a career in medicine, and passed the entrance exam for Gunma University two years after graduating from high school. He hopes to one day to have careers both as a shogi professional and a doctor.