Yamaguchi Prefecture is located in the end of the west in the Chugoku district, and is located in the position which faces the Kyushu district across Kammon Strait. Although it is also a place which can see the sea in both Setonaikai and the Sea of Japan, if eyes are changed to inland, there is a plateau of the limestone of Akiyoshidai called greatest Karst topography in Japan. The karst plateau in Akiyoshidai is what was able to do the plateau made in the limestone by being melted by old rain, and area is the greatest Karst topography in Japan that can also be an about 130ksquare meter. Karst topography is the geographical feature which was able to do the ground made in the limestone in response to the corrosion of rain water etc. moreover, there is a cave of a famous limestone cave called Akiyoshi-Do in the basement here, similarly, this also begins to melt into rain water, and a limestone is come out and made as for it to it. Although the karst plateau in Akiyoshidai is introduced here, it will be due to publish if Shuho-Do also carries out the completion of translation.
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