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.