Akiyoshidai

Cycling through Akiyoshi-dai (秋吉台) in Yamaguchi Prefecture offers a unique ride across Japan’s largest karst plateau. The route winds through rolling grasslands dotted with dramatic limestone formations, creating an otherworldly landscape unlike anywhere else in the country.
With smooth roads, gentle climbs, and sweeping views, Akiyoshi-dai is a rewarding ride for cyclists of all levels. Highlights include the Akiyoshi Cave, one of Japan’s largest limestone caverns, and the vast open scenery that changes beautifully with the seasons. The quiet, spacious roads make for a peaceful and immersive cycling experience, perfect for those looking to explore a different side of Japan’s natural beauty.
Route
Despite being looking so above-the-tree-line Akiyoshidai is only a few hundred meters above sea level.
Things to do
Akiyoshi Cave

Akiyoshi Cave, located in Yamaguchi Prefecture, is one of Japan’s largest limestone caves, stretching over 10 kilometers, with about 1 kilometer open to the public. Formed over hundreds of thousands of years, the cave features impressive rock formations, underground rivers, and vast chambers.
Visitors can walk along a well-lit path that showcases highlights such as the Hundred Plates (Hyakumai-zara), a series of terraced limestone pools, and the towering Gold Column (Ogonsui). The cave maintains a cool temperature year-round, making it a comfortable destination in any season. Akiyoshi Cave is a key attraction of the Akiyoshi-dai karst plateau, offering a fascinating glimpse into Japan’s geological history.

Getting there and away
Akiyoshidai is in central Yamaguchi prefecture making it a bit cumbersome to get to. The Mine line is about 10km to the West and Shin-Yamaguchi Station on the Sanyo Shinkansen about 25km to the Southeast