One (often stylized as ONE) is a manga artist, best known as the author and creator of One-Punch Man and Mob Psycho 100.
He grew up in Konosu, Saitama, and started getting interested in manga when his parents bought him Crayon Shin-chan. ONE also made several manga in the past that never got serialized such as "Sun Man" and "Tennis Player Ryu".
ONE started releasing One-Punch Man on his own website under no official publisher. A web version was later serialized by Weekly Young Jump with Yusuke Murata as the artist. Mob Psycho 100 was serialized in Ura Sunday, the online version of Weekly Shonen Sunday.
