| Mount Oizuru | |
| Other Name: | 笈ヶ岳 |
| Elevation M: | 1841 |
| Map: | Japan |
| Map Size: | 280 |
| Location: | Gifu Prefecture Ishikawa Prefecture Toyama Prefecture Japan |
| Range: | Ryōhaku Mountains |
| Coordinates: | 36.2986°N 136.7922°W |
| Topo: | Geographical Survey Institute, 25000:1 白山, 50000:1 白山 |
| First Ascent: | Prior to 1518 |
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.
Mount Oizuru, at 18410NaN0, 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 18210NaN0. There are three triangulation stations on the mountain's thin peak.
Taichō is said to have first scaled the mountain in the early eighth century.