An active volcano with a height of 618 meters located in the Keizan area at the eastern end of the Kameda Peninsula. It is designated as a provincial natural park, and visitors can drive up to the crater area. Vegetation near the summit is sparse, but the area at the foot of the mountain is famous for its 600,000 azaleas.
From late May to early June, a fiery carpet of azaleas spreads from the park to the mountainside. A walking trail has been developed, allowing visitors to take a leisurely stroll among the flowers. In addition to azaleas, more than 60 species of alpine plants grow in clusters.