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Narusawa Hyoketsu Ice Cave   

Cool even in summer! A cave where you can see icicles.

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Aokigahara Jukai (sea of trees) spreads out at the foot of Mt. Fuji. Narusawa Hyoketsu Ice Cave is located at the eastern entrance of that and is visited by many tourists throughout the year as one of the touring spots of Fuji Goko/Five Lakes. It is a cave created after lava flowed out from the eruption of Mt. Fuji lateral volcano Mt. Nagao in 864(the 6th year of Jogan era), and is a lava cave with a total length of 153 m.

The name was derived from the fact that the temperature inside is averagely as low as 3 degrees Celsius and is covered with ice all year round. The highlight is the icicles formed by freezing water droplets that have exuded from the ceiling. It will be the largest around April, and depending on the year, a huge icicle with a diameter of 50 cm and a height of 3 m may be seen. Moreover, at the innermost of the cave, there is a cave called "Jigokuana(Hell Cave)" that is connected deep underground, and according to a legend, it is connected to Enoshima.


  • Designated as a national natural monument in Showa era 4 (1929).
  • A cave that is geologically valuable worldwide.
  • In summer season, it is crowded with tourists who come out to cool off.
  • There are many slippery stairs, so watch your step.


  • The entrance of Narusawa Hyoketsu Ice Cave.

    The entrance of Narusawa Hyoketsu Ice Cave.

  • Inside the Narusawa Hyoketsu Ice Cave.

    Inside the Narusawa Hyoketsu Ice Cave.

  • The icicles in an ice cave.

    The icicles in an ice cave.


  • Cristina Lin


  • 文翰



Name in Japanese
Postal Code
8533 Narusawa, Narusawamura, Narusawamura, Minamitsurugun, Yamanashi
350yen for Adults, 200yen for Children (elementary school students)
* Please check the official website for other details.
Open all year round except for a certain period in December.
Business Hours
* Subject to change depending on the season. For more information, please contact us on the phone.
About 30 minutes by bus from Kawaguchiko Station on the Fujikyuko Line.
Official Website
Official Website (English)