At the Nankai Trough Earthquake in 1707, the easternmost peak collapsed

Mt. Goken, also known as Mt. Yaguri, is located on the border between Mure and Aji -cho in Takamatsu City, Kagawa Prefecture, and Yaguri Temple, the 85th temple of the 88 temples of Shikoku, is located at its foot. It is said that the mountain originally had five peaks, but at the Nankai Trough Earthquake in 1707, the easternmost peak collapsed, giving the mountain its current shape. This is evidence that only about 300 years ago, there was a tremor big enough to change the shape of the mountain here in Takamatsu City, Kagawa Prefecture.
Japan is located on the boundary of several plates, and the Nankai Trough earthquake is a trench-type earthquake caused by the subduction of the Philippine Sea Plate under the Eurasian Plate. These earthquakes are large-scale earthquakes that have occurred repeatedly in a cycle of about 100 to 150 years, and now, more than 70 years after the last Nankai Trough earthquake in 1946, the imminence of the next Nankai Trough earthquake is increasing. According to the Japanese government's current assumptions (2021), the probability of the next Nankai Trough earthquake occurring within the coming 30 years is 70-80%.