Akiyoshidai is a vast karst plateau located in Yamaguchi Prefecture, Japan. It is known for its unique limestone formations, rolling hills, and expansive grasslands, making it a popular destination for nature lovers and hikers. The area is part of the Akiyoshidai Quasi-National Park and features various walking trails that allow visitors to explore its stunning landscapes. The plateau is also home to the Akiyoshido Cave, one of Japan's largest limestone caves, which attracts tourists with its impressive stalactites and stalagmites. The region's rich biodiversity includes various plant and animal species, contributing to its ecological significance.