What is "hiruzen"

, or , is a mountain located on the border of Okayama and Tottori prefectures on the main island of Honshu in Japan. Hiruzen consists of three peaks of similar elevation, the highest being Mt. Kamihiruzen at . The Hiruzen Plateau, also called the Hiruzen Highland, is located entirely in Okayama Prefecture, and has an elevation of to . Hiruzen is an important part of the Daisen-Oki National Park.