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Mitake Castle Ruins

三岳城跡, Mitake Jouseki

A somewhat strenuous hike will bring you to the ruins of a castle built atop 467-m Mt. Mitake in 1340 by the Ii Clan.

Listing from Wikivoyage: Hamamatsu, CC BY-SA 4.0.

Updated 28 Sept 2026. Something wrong? Tell us.

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Washizawa Wind Cave
鷲沢風穴, Washizawa Fuuketsu
A less touristy alternative to Ryugashido, this limestone cave has cool winds blowing through it during the summertime. This is the only cave in Japan with a horizontal ceiling. The cave supposedly provided a refuge for warriors during the 1300s.
¥400
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Takizawa Observation Platform
滝沢展望台, Takisawa Tenboudai
This spot offers a beautiful vista of the city from which you can see all the way to Act City and all across Lake Hamana. Popular with local couples, the view is especially good at night when the city is lit up.
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Ryōtan-ji Temple
龍潭寺
The main hall here has "nightingale flooring" much like Nijo castle in Kyoto. When walked on, the flooring makes subtle bird sounds to warn of intruders. The garden here is a nationally designated scenic beauty. On the south side of the temple is a well which belonged to the founder of the Ii clan in the early 11th century.
Daily 09:00-16:30¥400, children ¥150
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Ryugashi Cavern
竜ヶ岩洞, Ryugashidou
One of the largest and most famous caves in Japan. The first 400 m of the 1000-m limestone cavern are open to the public. Stalactites and stalagmites abound, and the centerpiece is a 30-m underground waterfall. This cave stays about 15°C year-round, making it a great place to cool off during the sweltering summer heat.
Closed · opens 9 amAdults ¥650, children 13-15 ¥450, children ¥350