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    The colorful lights shining on the stalactites look really nice. Just be careful—the ground can get pretty wet in there.

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    You can get here directly by bus from JR Okutama Station. The cave is cool inside, making it a perfect spot during the hot summer. The formations, shaped over tens of thousands of years, are definitely worth seeing! I also recommend enjoying some trekking or hot springs in the area.

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    I went during the summer and it felt super cool inside. The cave stays around 10°C all year. The stalactites were just okay—nothing too special, honestly.

Hokkaido Tohoku Kanto Chubu Hokuriku Kansai Chugoku Shikoku Kyushu Okinawa