Genbudo Park

What is Genbudo Park?

Genbudo, which means Basalt Cave or Black Tortoise Cave in Japanese, comprises five caves formed by columnar joints more than 1.6 million years ago. This geological formation occurred after the magma from a volcanic eruption cooled, contracted, and created vertical cracks. The sinuous columns display a unique polygonal shape and a honeycomb pattern. The caves are named after four Chinese mythological creatures: Genbu (Black Tortoise), Seiryu (Azure Dragon), Byakko (White Tiger), and Suzaku (Phoenix). There are two caves named after the Phoenix, distinguished as North Phoenix and South Phoenix.

Originally a quarry during the Edo Period (1603-1867), the Genbudo Caves served as a source of building materials. This historical utilization has left recessed areas in the caves, still visible today. The locals identified the rocks' suitability for construction, and remnants of these basalt rocks can be observed throughout the area, including the park's pathways.

Beyond their geological appeal, the basalt rocks hold scientific and historical significance. In 1926, Japanese geophysicist Motonori Matuyama proposed the theory that Earth's magnetic field had undergone reversals in the past. His hypothesis was based on the discovery that the polar magnetic alignment of the Genbudo basalt is opposite to the Earth's current magnetic polarity. The geological evidence found at Genbudo indicates a reversal of magnetic polarity during the formation of this basalt.

How to get there?

While Genbudo does have its own train station, there is a significant river separates the station and the park. However, there's a solution for visitors arriving by train: a boat can be called for pick-up. Before boarding the train, it's advisable to call the museum and inform them of your estimated arrival time at Genbudo Station. The boat fare is 700 yen for adults, 400 yen for children, and 200 yen for infants for a round trip. It's important to note that the boat may not operate during adverse weather conditions.

Alternatively, visitors can access Genbudo Museum and Park by taxi, rental car, or bicycle.

For further information, please access the official website: https://genbudo-park.jp/