Futaro Yamada (January 4, 1922 - July 28, 2001) was the pen name of Seiya Yamada (Yamada Seiya), a Japanese author. He was born in Yabu, Hyogo. In 1947, he wrote a mystery novel Daruma-tōge no Jiken (, lit. "The Incident on Dharma Pass") and was awarded a prize by a novel magazine Houseki (). He was discovered by Edogawa Rampo and became a novelist. He wrote many ninja ( Ninpōchō series) and mystery stories. Many of his works have been adapted for film, TV, manga, and anime.

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