is located on the borders of Gifu, Ishikawa and Toyama prefectures in Japan. It is in the northern area of Hakusan National Park and is part of the Ryōhaku Mountains. Geography Mount Oizuru, at , is the tallest mountain in the northern part of the Ryōhaku Mountains. Just north of the mountain is Mount Ōgasa (大笠山 Ōgasa-yama), which is slightly shorter at . There are three triangulation stations on the mountain's thin peak. History Taichō is said to have first scaled the mountain in the early eighth century. Gallery References See also Hakusan National Park Ryōhaku Mountains Taichō Mountains of Gifu Prefecture Mountains of Ishikawa Prefecture Mountains of Toyama Prefecture