Rising above the Seto Inland Sea, this iconic flat-topped plateau offers breathtaking panoramic views of Takamatsu and the surrounding islands. The mountain is home to the historic Yashima-ji Temple, part of the 88-temple pilgrimage, and the site of a legendary 12th-century naval battle, blending deep samurai history with scenic walking trails. Visitors can explore the summit’s unique "aquarium in the sky" or simply enjoy one of Japan’s most celebrated sunset spots.