Birth place: Kooriyama, Fukushima Prefecture, Japan
Birthday: Feb 26, 1971
Family name: 弐瓶
Given name: 勉
Nihei studied architecture and went abroad to work one year in New York. After that year, he returned to Japan and decided to become a mangaka. He started at Koudansha's Afternoon and has been Takahashi Tsutomu's assistant for a while (working on Jiraishin).