Mushikui-iwa, Natural monument in Kozagawa, Japan
The Mushikui-iwa formation displays numerous holes across its surface caused by wind and rain erosion of the rhyolite volcaniclastic rock.
The rock belongs to the Kozagawa arc-shaped dike, representing the underground section of the Kumano Caldera formed 15 million years ago.
Local traditions suggest that threading a pebble with a hole found at Mushikui-iwa through string helps cure ear ailments at Kannon-Do shrine.
The Mushikui-iwa Roadside Station provides parking facilities, restrooms, and a shop selling local products including Yuzu and Jibie.
The natural formation shows tafoni patterns, created when surface evaporation causes gypsum to transform and make rock layers separate and fall.
Location: Kozagawa
GPS coordinates: 33.53972,135.82611
Latest update: March 12, 2025 07:42
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