Ryunosuke Matsushita (born 1991) is a Japanese novelist and engineer. After earning a master's degree in engineering from the Chiba Institute of Technology, he built a career designing and proposing high-pressure pump systems while pursuing fiction writing. He made his literary debut in 2025 after winning the Grand Prize in the 23rd "Kono Mystery ga Sugoi!" Awards for his novel "Ichijigen no Sashiki" ("One-Dimensional Grafting"). His work is noted for combining scientific knowledge and engineering concepts with intricate mystery plots. His best-known work, "Ichijigen no Sashiki," is a forensic mystery that weaves DNA analysis and medical science into a tightly constructed investigative narrative.
