Why the Kerama Islands Belong on Your Okinawa Itinerary
The Kerama Islands — a cluster of small islands designated as Keramashoto National Park — are widely regarded as one of the finest marine destinations in all of Japan. With visibility stretching over 30 metres on calm days, the ocean here has earned the nickname "Kerama Blue." Whether you're a diver, snorkeller, whale watcher, or simply someone who wants to sit on a near-deserted beach, the Keramas deliver.
Getting There
Ferries depart from Tomari Port in Naha, making the islands highly accessible as a day trip or overnight stay.
- High-speed ferry (Queen Zamami): Reaches Zamami Island in approximately 50 minutes and Aka Island in around 70 minutes.
- Slow ferry (Marine Liner Tokashiki): Takes about 70 minutes to Tokashiki Island — cheaper but less frequent.
- Booking ahead: Tickets sell out fast in summer (July–August) and Golden Week. Book at least a few days in advance via the ferry operators' websites or at Tomari Port.
The Main Islands at a Glance
| Island | Best For | Stay Overnight? |
|---|---|---|
| Zamami | Snorkelling, diving, whale watching | Yes — good range of guesthouses |
| Aka | Quiet beaches, sea kayaking | Yes — small but charming minshuku |
| Tokashiki | Longest beaches, cycling | Yes — largest island, most facilities |
| Geruma | Accessible from Aka by bridge, very quiet | Limited |
Best Time to Visit
The Kerama Islands are beautiful year-round, but the season shapes your experience significantly:
- January–March: Humpback whales migrate through Kerama waters — this alone is worth the trip.
- April–June: Warm enough to swim, far fewer crowds, and sea conditions are generally calm.
- July–August: Peak beach season. Stunning but busy and hot. Book everything early.
- September–November: Typhoon risk eases by October; pleasant temperatures and quieter beaches.
Top Activities
Snorkelling and Diving
The coral reefs around Zamami and Aka are exceptionally healthy. Even beginner snorkellers can see colourful fish and coral from the shore at beaches like Furuzamami and Nishibama. Numerous dive operators on the islands offer guided dives for all levels.
Whale Watching
From late January to late March, humpback whales reliably visit Kerama waters to breed. Boat tours run daily during this season from Zamami Port, and sightings are very frequent — it's one of Japan's best whale-watching experiences.
Cycling
Tokashiki Island is ideal for cycling. Rent a bicycle near the port and follow the road along the coast to Tokashiku Beach — a long, pine-fringed arc of sand that feels like the edge of the world.
Practical Tips
- Cash is king on the smaller islands — bring enough yen before boarding the ferry.
- Many guesthouses include meals; confirm when booking, as restaurant options are limited after dark.
- Sunscreen: opt for reef-safe formulas to protect the coral.
- Mobile signal is available but can be patchy — download offline maps before departure.
The Kerama Islands reward travellers who slow down. Pack light, leave your schedule flexible, and let the Kerama Blue work its magic.