The mountain is near the coast, and controls the approach to the Utazu area, which was an important port on the Seto Inland Sea during the Muromachi period.

Their independence was short-lived, as the entire area was conquered by Chōsokabe Motochika, a warlord from Tosa Province in 1577.

During Hideyoshi's conquest of Shikoku, the Kagawa clan were deprived of Amagiri Castle and exiled to Tosa Province.

[2] At present, nothing remains of the castle except for some fragments of stone walls and evidence of rock quarrying near the peak.

Ten site is about 20 minutes by car from Zentsuji Station on the JR Shikoku Dosan Line.