電擊小說大獎
Kazuma Kamachi started his work with "A Certain Magical Index" when he received a call from Kazuma Miki, the light novel editor, after his submission was rejected at the 9th Dengeki Game Novel Prize (now Dengeki Novel Prize) in 2002. Miki began to train him in writing multiple test novels, including a story about a girl sister and a boy with a mysterious arm which became the basis for his light novel.