Kashiwajima Island

**Diving:** Kashiwajima has 30+ dive sites, ranging from shallow reefs (10m) to deep walls (30m). The most famous site is 'Tatsukushi' — a coral-covered reef teeming with tropical fish. Dive shops in Kashiwajima offer guided dives with English-speaking guides (advance booking required). PADI certification courses also available. **Snorkeling:** For non-divers, snorkeling is excellent. The best snorkeling is off the island's southern coast, where shallow reefs (2–5m depth) are accessible from the beach. Rent gear at Kashiwajima Marine Park (¥1,500 for mask, fins, snorkel). Best visibility is on calm, sunny days. **Sea turtles:** Kashiwajima is known for sea turtle sightings. Green turtles and loggerhead turtles frequent the area, especially near the seagrass beds on the island's west side. Snorkeling in the early morning (7:00–9:00) increases your chances. **Glass-bottom boat:** If you prefer to stay dry, take a glass-bottom boat tour (¥2,000, 40 min). The boat departs from the island's port and cruises over coral reefs and rock formations. Turtles and large fish are often visible through the glass floor. **Best season:** June–October for warmest water and best visibility. May and November are slightly cooler but less crowded. Winter (December–March) is possible for experienced divers (wetsuit required), but seas can be rough. **Accommodation:** Stay on the island at Minshuku Kashiwajima (民宿柏島, from ¥8,000/night with meals) for the full experience — wake up to ocean views, dive in the morning, eat fresh-caught fish for dinner. Or stay in Tosashimizu and drive over for the day. **Getting there:** Rental car from Kochi is the easiest (3 hours via Route 56). Alternatively, take the bus from Kochi to Tosashimizu (2.5 hours), then taxi to Kashiwajima (20 min, ¥3,000).