The Chūgoku region (Japanese: 中国地方, Hepburn: Chūgoku-chihō; [tɕɯꜜː.ɡo.kɯ, -ŋo.kɯ, tɕɯː.ɡo.kɯ̥ tɕiꜜ.hoː, -ŋo.kɯ̥-]), also known as the San'in-San'yō (山陰山陽地方, San'in-San'yō-chihō) region, is the westernmost region of Honshū, the largest island of Japan. It consists of the prefectures of Hiroshima, Okayama, Shimane, Tottori and Yamaguchi. As of the 2020 census, it has a population of 7,328,339.