Ryohei Machiya (born 1983) is a Japanese novelist from Tokyo. He made his literary debut in 2016 after winning the Bungei Prize for "Ao ga Yabureru." In 2019, he received the Akutagawa Prize for "1R 1-pun 34-byo," followed by the Noma Literary New Face Prize for "Hon no Kodomo" in 2022, the Kawabata Yasunari Prize for Literature for "Watashi no Hihyo" and the Oda Sakunosuke Prize for "Ikiru Engi" in 2024, and the Minister of Education, Culture, Sports, Science and Technology's Art Encouragement Prize for "Watashi no Shosetsu" in 2025. "1R 1-pun 34-byo" follows a 21-year-old professional boxer who has stopped winning after a promising debut and begins training with an unconventional new trainer. Focusing closely on the relationship between thought, language, and physical movement, the novel traces his struggle to understand his own limitations and find a way forward.