It is Mine City, Yamaguchi Prefecture, which has one of the largest karst plateaus in Japan, "Akiyoshidai", and one of the largest limestone caves in Japan, "Akiyoshi-dong". Please come to Mine City, which is full of charm where you can enjoy the open scenery that makes your heart clear and sunny during the day, and the starry sky that sucks you in at night. Not only will you be able to enjoy the extraordinary, but you will also be energized from the depths of your body from tomorrow, and there is no doubt that you will be able to recharge your energy for tomorrow.