Shichiri Nakayama (1961–) is a Japanese novelist best known for his mystery fiction. He made his literary debut after winning the 8th "Kono Mystery ga Sugoi!" Grand Prize for "Goodbye Debussy" in 2009. Since then, he has written across a wide range of genres, including musical mysteries, police procedurals, legal thrillers, medical mysteries, and socially themed suspense novels. Known for his intricate plotting and unexpected twists, Nakayama has become one of Japan's most prolific contemporary mystery writers. His breakthrough novel, "Goodbye Debussy", launched the popular Misaki Yosuke series and established his reputation among a broad readership.