Sandanbeki is the oldest scenic attraction in Nanki-Shirahama. Legend has it that during the reign of Emperor Kanmu, Sandanbeki Cave served as a refuge for local fishermen hiding from pirates while at sea. By the Heian period, it had become an important base for the Kumano Navy. Today, it is one of Shirahama's most iconic historic attractions.
Sandanbeki in Shirahama, Wakayama Prefecture, is part of Yoshino-Kumano National Park. It is a famous Shirahama attraction and is also designated a sacred place for lovers. Sandanbeki Cave lies 36 meters underground. After taking the elevator down, the cave adventure begins, with many spectacular natural wonders to see. From the observation deck inside, you can see Juzo-iwa Rock, an unusual formation that appeared after a typhoon. In the cave, you can experience up close the powerful sight of waves crashing against the rock walls and surging inside. The huge waves are truly imposing, and both the sound and sight are striking. One unusual feature is that the purification basin uses hot spring water. Card-shaped ema plaques can be used to pray for health, wealth, academic success, love, and traffic safety. Some areas recreate Kumano Navy guard huts, old passageways, and other scenes. Being there feels like falling through a time tunnel and returning to the historic setting of the Genpei War.
This attraction, where history and nature come together, is worth including in a trip to Nanki. Being inside the cave feels completely different from seeing it in photos. You have to be there to experience its impact. I recommend arriving around high tide, when the crashing waves are at their most dramatic!
