444 Yatsukacho Terazu, Matsue, Shimane 690-1407.
Adults JPY 500, Children free.
|Dimension:||L=80 m, T=15 °C.|
|Guided tours:||L=100 m.|
Ryukeido, 444 Yatsukacho Terazu, Matsue, Shimane 690-1407.
Matsue Tourism Association Yatsukacho Branch, Tel: +81-852-61-5650, Tel: +81-90-3178-2483.
Nature Observation Instructor Kazuya Kadowaki, Terazu, Yatsukacho, Matsue City, Shimane Prefecture, Tel: +81-852-76-2397. E-mail:
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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|1933||cave accidentally discovered during road construction.|
|07-JUN-1945||designated a National Natural Monument.|
竜渓洞 (Ryukeido) is also known as 新洞 (new cave) or 大根島第二溶岩隧道 (Daikonjima No. 2 Lava Tunnel) as it was later discovered than nearby Yuki do (Ghost Cave). The name Ryukeido was given because of the unusual shape of the cave, which resembles the residence of the dragon god Sumika. The cave has lava stalactites and pahoehoe lava (rope-shaped lava), also known as Pele's Hair, because it looks like braided hair. It is home to several traglobionts. Quite famous are the Gammaridea and the actinomycetes fungus.