Just off the west coast of the Main Island, the Kerama Islands are famous for water so clear that it has its own name: Kerama blue. Fine white beaches, coral reefs, sea turtles, and winter humpback whales make these small islands one of Okinawa’s most rewarding trips, and they’re easy to reach by ferry from Naha.
Overview
The Kerama group lies roughly 40 km (25 mi) west of Naha and includes more than 30 islands and islets, of which only a few are inhabited. The main ones for visitors are Tokashiki, the largest and closest to Naha, and Zamami, Aka, and Geruma, which form Zamami Village. Aka and Geruma are linked by bridge.
The islands and their surrounding waters became the Keramashoto National Park in 2014. Life here is slow and quiet: a handful of villages, a few shops, and a lot of sea.
Each island has its own feel. Tokashiki has the most services and the easiest day-trip access. Zamami balances beaches, viewpoints, and a lively little village. Aka and Geruma are the quietest of all, favored by divers and anyone who wants to switch off for a few days.
Best Time to Visit
Swimming and snorkeling season runs from around April to October, with sea temperatures reaching the high 20s °C (low to mid-80s °F) in summer. From roughly January to March, humpback whales visit to breed, and whale-watching tours run from Zamami and Tokashiki. Winter air temperatures are mild, typically around 20–22°C (68–72°F) in the daytime, but seas can be rough.
Weather matters more here than on the Main Island: ferries can be cancelled during typhoons and strong winds, so keep plans flexible. See the best time to visit Okinawa.
Getting There
All ferries leave from Tomari Port in Naha, a short walk from Miebashi Station on the monorail. Approximate journey times:
| Route | High-speed boat | Regular ferry |
|---|---|---|
| Naha – Tokashiki | About 40 minutes | About 70 minutes |
| Naha – Zamami / Aka | About 50–70 minutes | About 90–120 minutes |
High-speed boats fill up in summer and on weekends, so reserve ahead where possible. Tokashiki works well as a day trip; Zamami and Aka are better with at least one night. Small inter-island boats connect Zamami and Aka. See getting to Okinawa and getting around Okinawa.
Getting Around
The islands are small. On Tokashiki, a bus connects the port with Aharen Beach, and rental cars and scooters are available. On Zamami, a village bus runs to the beaches, and many visitors rent bicycles or scooters, or simply walk. Aka and Geruma are small enough to explore on foot or by bicycle. Check bus times when you arrive, as services are limited.
Top Things to Do in the Kerama Islands
Beaches
- Furuzamami Beach (Zamami): a long, white beach with excellent snorkeling, facilities, and lifeguards in season.
- Ama Beach (Zamami): a calm beach near the port where sea turtles are often seen. Watch from a distance and never touch them.
- Nishibama Beach (Aka): a beautiful, quiet stretch of sand with clear water.
- Aharen Beach (Tokashiki): the island’s main beach, with shops and marine activity operators.
- Tokashiku Beach (Tokashiki): a sheltered bay that’s popular for snorkeling.
See the best beaches in Okinawa.
Snorkeling and Diving
The Kerama Islands are one of Japan’s best-known diving areas, with healthy coral, turtles, and excellent visibility. Dive shops on the islands and in Naha run trips for all levels, and guided snorkel tours are a great way to see more than you would from the beach. See snorkeling and diving in Okinawa.
Whale Watching
In winter, humpback whales gather around the islands. Tours run from Zamami, Tokashiki, and Naha during the season. Lookout points such as the observatories on Zamami are also used to spot whales from land.
Viewpoints
Zamami has several hilltop observatories with sweeping views over the islands and sea. They’re also the best places to watch sunset. On Tokashiki, viewpoints along the island’s main road look down over Aharen and Tokashiku beaches.
Kerama Deer
Aka and Geruma are home to the small Kerama deer, a protected natural monument. You may see them near the roads in the early morning or evening. Please don’t feed them.
History
In March 1945, US forces landed in the Kerama Islands before the main invasion of Okinawa. Many island civilians died in tragic group deaths during the fighting, and memorials stand on the islands today. Learn more in WWII and the Battle of Okinawa.
Where to Stay
- Zamami village: the widest choice of guesthouses and small hotels, close to the port, restaurants, and Ama Beach.
- Aka village: small, quiet guesthouses, ideal for divers.
- Tokashiki (Aharen area): guesthouses and small hotels near the island’s main beach.
- Naha: stay in the city and visit Tokashiki as a day trip.
Accommodation is limited and books up in summer, so reserve early. See where to stay in Okinawa.
Where to Eat
Choices are small and simple: a few casual restaurants, cafés, and izakaya in each village, plus small shops for snacks and drinks. Many guesthouses offer meals, which is worth considering since some restaurants close early or on irregular days. Expect fresh fish, Okinawa soba, and home-style dishes. Carry cash, as not every business accepts cards. See our food and drink guide.
Practical Tips
- Bring cash. ATMs and card payments are limited on the islands.
- Pack reef-safe sunscreen, a rash guard, and water shoes. The sun is strong and coral is sharp.
- Watch for jellyfish and currents. Swim at beaches with facilities, and follow lifeguard advice.
- Mind the coral. Don’t stand on reefs or take coral, shells, or sand home.
- Go easy on alcohol before diving or snorkeling. And don’t fly within the recommended time after diving.
- Leave a buffer. Don’t book your Kerama return on the same day as a flight out of Okinawa if you can avoid it.
Rental gear for snorkeling is easy to find near the main beaches, but if you have your own mask, bring it. A dry bag is handy for boat trips and for keeping your phone safe on the beach.
Sample Plans
Day trip to Tokashiki
- Morning: High-speed boat from Tomari Port; bus to Aharen Beach.
- Midday: Snorkel or join a marine tour, then lunch near the beach.
- Afternoon: Visit a viewpoint or Tokashiku Beach, then take the boat back to Naha.
Two days on Zamami and Aka
- Day 1: Morning boat to Zamami; afternoon at Furuzamami Beach; sunset from a hilltop observatory.
- Day 2: Morning snorkel with turtles at Ama Beach, then a short boat to Aka for Nishibama Beach before the return ferry to Naha.
Fit the Kerama Islands into a longer trip with our Okinawa itineraries.
Frequently Asked Questions
Can I visit the Kerama Islands as a day trip?
Yes. Tokashiki is the easiest day trip, and Zamami works with the high-speed boat. Staying overnight is more relaxing and lets you enjoy the islands after day-trippers leave.
Which Kerama island is best?
Zamami for a mix of beaches, viewpoints, and places to stay; Aka for quiet and diving; Tokashiki for the easiest access from Naha.
Do I need to book the ferry?
It’s strongly recommended for the high-speed boats in summer, on weekends, and during holidays.
Can I see sea turtles?
Often, especially around Ama Beach on Zamami. Keep your distance and never touch or chase them.
What happens if the ferry is cancelled?
Cancellations are common in rough weather. Check the operator’s website on the day, and leave a buffer before flights home.