Tensodo - Dogashima's biggest attraction The Tensodo is made of white tuff, and a sea erosion tunnel is formed underneath like a beehive. Restrooms available to this cave are the east, south, and west entrances, and the tour boat enters from this south exit and proceeds to the skylight with a round ceiling in the center, and a band of light shines from the ceiling to the sea surface in the dark cave, and you can see a mysterious scene. This Tensodo can also be seen from above the Restrooms available Tensodo on the Course of Dogashima Promenade. ■Address Dogashima, Nishina, Nishi-Izu Town, Kamo-gun, Shizuoka

The Mizonoguchi Cave in Soto City, Kagoshima Prefecture, is a cave created over a long period of time by spring water from the Kirishima Mountains, and is a power spot in Kagoshima. It can be said that it is a landscape typical of Japan with many volcanoes, and the inside of the cave was a mysterious place with clear air.

"Blue Cave" in Suzu City, Ishikawa Prefecture.

Siga Kawauchi wind cave