Futaro Yamada was the pen name of Seiya Yamada , a Japanese author. He was born in Yabu, Hyogo. In 1947, he wrote a mystery short story Daruma-tōge no Jiken and was awarded a prize by the magazine Houseki (宝石). He was discovered by Edogawa Rampo and became a novelist. He wrote many ninja and mystery stories. Many of his works have been adapted for film, TV, manga, and anime.

The Kouga Ninja Scrolls is a historical fantasy novel about ninja written in 1958–1959 by the Japanese author Futaro Yamada. It is the first installment in Yamada's Ninja Scrolls series, which he wrote until his death in 2001. The book was translated into English by Geoff Sant, and published by Del Rey in December 2006.