Kashiwajima Island
柏島
A small island in Otsuki Town with water so clear that boats seem to float in midair. More than 1,000 fish species have been recorded here, making it one of Japan's top diving destinations.
Kashiwajima lies at the southwest tip of Shikoku in Otsuki Town and is linked to the mainland by two bridges. Under the influence of the Kuroshio, its waters often have visibility of more than 20 m, so boats seem to hover in the air, a favorite of social media. More than 1,000 fish species have been recorded nearby, making it a well-known diving and snorkeling spot in Japan. In summer you can swim at the beach under the bridge, ride a glass-bottom boat or join a stand-up paddleboarding (SUP) session. Accommodation and restaurants on the island are limited, and parking is tight on summer weekends. It is about 1 hour 10 minutes by car from Shimanto City.
Opening hours
All day
Nearby sights
- Ashizuri Underwater Observatory
- Ashizuri Aquarium SATOUMI
- Tatsukushi & Minokoshi Coast
- John Manjiro Museum
- Okinohama Beach
- Shimanto River Yakatabune Boat
- Sada Chinkabashi Bridge
- Tojindaba Megaliths