ナンバーガール
is a male Japanese light novelist from Fukui, Japan. In June 2003, he made his debut with the "Ballad of a Shinigami" series of light novel and has gone on to create several other works. He enjoys listening to the bands Bump of Chicken, The Pillows, Number Girl, and Zazen Boys, among others, and makes references to song lyrics produced by these bands in his work.