Naruto Whirlpools
The Naruto Whirlpools are powerful tidal currents that form in the Naruto Strait, a narrow channel separating Awaji Island and Shikoku in Japan's Seto Inland Sea. These natural phenomena occur when massive volumes of water rush through the strait during tidal changes, creating swirling vortexes that can reach up to 20 meters in diameter. The whirlpools have been documented for centuries and are mentioned in historical records dating back to the 8th century, featured in classical Japanese literature and woodblock prints as symbols of nature's raw power.
The strait's unique geography creates ideal conditions for these whirlpools. The tidal difference between the Pacific Ocean and the Seto Inland Sea can exceed 1.5 meters, forcing water through the narrow 1.3-kilometer-wide channel at speeds reaching 20 kilometers per hour. The whirlpools are most dramatic during spring tides, which occur twice monthly around the new and full moons, though they form to varying degrees throughout the year depending on tidal conditions.
Visitors can experience the whirlpools from two main vantage points. The Onaruto Bridge, which connects Awaji Island and Shikoku, features the Uzunomichi walkway suspended 45 meters above the water with glass floor panels allowing direct views of the swirling currents below.
Alternatively, sightseeing boats depart from both the Tokushima side and Awaji side, taking passengers directly into the strait for close-up encounters with the whirlpools. These cruise boats operate daily and provide the most immersive experience, though the intensity of the whirlpools varies significantly with the tide schedule.
The nearest major city is Tokushima on Shikoku, accessible by highway bus from Osaka in approximately 2.5 hours or Kobe in 1.5 hours. From Tokushima Station, local buses run to the whirlpool viewing areas. Visitors approaching from Awaji Island can reach the site via the Onaruto Bridge by car or bus from Kobe or Osaka.
