The Sanuki Mountains (讃岐山脈 Sanuki-sanmyaku?) are a mountain range running along the southern border of Kagawa and the northern border of Tokushima prefectures on the island of Shikoku, Japan.
The highest peak is Mt. Ryūō (竜王山 Ryūō-zan?) at 1059.9m.
Parts of the mountains are included within the Ōtaki-Ōkawa Prefectural Natural Park.
34°06′56″N 134°02′54″E / 34.11544167°N 134.0482056°ECoordinates: 34°06′56″N 134°02′54″E / 34.11544167°N 134.0482056°E ( Mt.Ryūō )