Akiyoshido Cave

Overview

Akiyoshido Cave, located in Akiyoshi-cho, Mine City, Yamaguchi Prefecture, is a designated National Special Natural Monument and one of Japan's leading karst caves. Opening at the southern foot of Akiyoshidai, it boasts a total length exceeding 11.2km, making it the second longest in Japan. Emperor Showa named it "Akiyoshido." The cave maintains a constant temperature of 17℃ throughout the year, providing a comfortable experience – cool in summer and warm in winter. Highlights include the enormous "Senjojiki" space (175m long, 80m wide, and 35m high), the 30m-tall "Golden Pillar," the "Kotoga-fuchi" (a pool formed by underground water erosion), and the "Hyakumai-zara" (a formation resembling 100 plates, 10m wide and 15m high). Akiyoshidai itself is a limestone plateau formed over millions of years by the uplift of a coral reef that originated in the sea approximately 350 million years ago, and subsequent erosion by rainwater and groundwater. Akiyoshido represents the geological value and scenic beauty of Akiyoshidai. Akiyoshido is a mystical space created by the power of nature and is one of Japan's premier tourist destinations. A visit allows you to experience the grandeur of nature.