Kerama Islands Okinawa Prefecture Travel Guide

The Kerama Islands (慶良間諸島) are a group of roughly 20 islands and islets located about 30 to 40 kilometers west of Naha, the capital of Okinawa Prefecture. The main inhabited islands are Tokashiki, Zamami, Aka, and Geruma. In 2014, the archipelago was designated Kerama Islands National Park, recognizing its outstanding marine and terrestrial ecosystems.

The waters surrounding the Keramas are often described by divers as some of the clearest in Japan, with visibility frequently exceeding 30 meters. The phrase Kerama Blue has become shorthand among Japanese divers for the distinctive shade of the surrounding sea. The reefs here support extensive hard and soft corals and a diverse range of marine life, including sea turtles, manta rays, and reef sharks.

On land, the islands are low-key and largely undeveloped. Tokashiki is the largest and most visited, while Zamami and Aka have a slightly more remote feel. All of the main islands have small villages, guesthouses, restaurants, and rental shops, but visitors expecting resort-style facilities should adjust their expectations — the Keramas reward those looking for simplicity and nature.

The islands are also a well-known site for watching humpback whales, which gather in the surrounding waters during winter months, typically January through March.

Visas

Japan has specific visa requirements that vary by nationality, length of stay, and purpose of travel. For accurate, up-to-date guidance, check TravelerPulse's Visas section and the official website of Japan's Ministry of Foreign Affairs or your nearest Japanese embassy or consulate.

When to Go

• January–March: Cool and occasionally windy; humpback whale season. Some smaller businesses may have reduced hours.
• April–June: Often considered the best all-around window — warm, relatively calm seas, good visibility, fewer crowds than summer.
• July–August: Peak domestic tourism season. Accommodation books up well in advance; ferries can be crowded. Water temperatures are high and conditions are generally good for swimming.
• September–October: Typhoon season overlaps with this period. Ferries and activities can be cancelled with little notice. Check forecasts carefully.
• November–December: Quieter, cooler. Some guesthouses and dive operators reduce services or close temporarily.

What to Pack

Light, quick-dry clothing suits most of the year. A wetsuit is advisable for diving and snorkeling outside summer. Bring reef-safe sunscreen, as conventional sunscreens containing oxybenzone and octinoxate are harmful to coral and their use is actively discouraged throughout the national park. Mosquito repellent is useful in warmer months.

From Naha (Tomari Port)

The primary gateway to the Kerama Islands is Tomari Port in Naha. High-speed ferry services (jetfoil) and slower car ferries connect Naha to Tokashiki, Zamami, and Aka islands. Journey times vary: jetfoils to Zamami take roughly 50 minutes; the slower car ferry takes longer. Schedules, frequency, and fares change seasonally — verify current timetables with the ferry operators or at Tomari Port before your trip.

Flights

There is a small airstrip on Fukuji Island (serving Zamami Village), but scheduled commercial flights are not reliably available to visitors. Ferry is the standard access route for almost all travelers.

Booking Ahead

During peak summer weekends and national holidays (particularly Golden Week in late April to early May), ferry tickets sell out quickly. Book as far in advance as possible. Day-trippers from Naha are common, so accommodation on the islands is limited — securing a room before arranging your ferry is advisable.

Each inhabited island is small enough that many beaches and key points of interest are reachable on foot from the village centers, though hills can make some routes tiring in summer heat.

• Bicycle and scooter rental is available on Tokashiki, Zamami, and Aka and is the most practical way to explore. Confirm rental shop hours and availability before arrival, particularly in off-season.
• Local buses operate on Tokashiki Island on a limited schedule, primarily timed to ferry arrivals and departures. Verify locally.
• Between islands: A small scheduled ferry connects Zamami and Aka (a short crossing). Getting between Tokashiki and Zamami/Aka typically requires returning to Naha, though seasonal tour boats sometimes make inter-island runs — check locally.
• Taxis exist on the larger islands but are scarce; do not rely on them as your primary transport option.

Accommodation on the Kerama Islands consists almost entirely of small guesthouses (minshuku), family-run inns, and a limited number of small hotels. There are no large international hotel chains on the islands. Many guesthouses include meals (breakfast and dinner) as part of the room rate, which is worth confirming at the time of booking since dining options outside of accommodation can be limited, particularly in the evening.

Tokashiki has the widest selection of accommodation given its larger population. Zamami and Aka have fewer options but are popular with divers who prefer a quieter base. Booking well in advance is essential for July, August, and the Golden Week holiday period. Outside peak season, some properties close or operate with reduced capacity — confirm directly with your chosen guesthouse before finalizing plans.

Camping sites exist on some islands, including a site near Aharen Beach on Tokashiki. Facilities are basic. Check current status and permit requirements locally before planning a camping stay.

Diving and Snorkeling

The reefs surrounding the Keramas are the primary draw for most visitors. Licensed dive operators on Tokashiki, Zamami, and Aka offer guided dives for certified divers and introductory dives for beginners. Popular dive sites include areas known for sea turtle encounters and healthy coral formations. Snorkeling directly from several island beaches is also productive, with turtles frequently visible without going far from shore. Confirm operator credentials and safety standards before booking.

Whale Watching

Between approximately January and March, humpback whales move through the waters near the Keramas. Guided whale-watching boat tours depart from Zamami and other islands during this period. Sightings are not guaranteed, but encounter rates are generally considered high during peak season. Verify current tour availability and departure points locally or with your accommodation.

Beaches

Aha Beach (Aka Island), Furuzamami Beach (Zamami Island), and Aharen Beach (Tokashiki Island) are among the most visited. All are known for clear, calm water and good snorkeling from shore. Facilities at beaches vary — some have rental equipment and basic food stalls during peak season; others are undeveloped. Verify what is available before you go.

Kayaking

Sea kayak rentals are available on several islands and offer a way to explore coastal rock formations, small islets, and quieter coves. Guided tours are also offered. Conditions can change quickly; follow local advice on safe areas and weather windows.

Hiking and Island Walking

Trails on Zamami and Tokashiki lead to elevated viewpoints overlooking the surrounding ocean. These walks are generally short but can be steep and exposed to sun. Start early in warmer months and carry water.

Dining options on the Keramas are modest in number. Most restaurants are concentrated near village centers and ferry ports, with some beach-adjacent food stalls operating during peak summer season only.

Local food reflects broader Okinawan culinary traditions: expect dishes featuring locally caught fish and seafood, Okinawa soba (a wheat-based noodle soup distinct from mainland soba), champuru stir-fries (often with bitter melon, tofu, or pork), and rice-based meals. Fresh seafood is a reliable highlight given the islands' location.

Some guesthouses provide dinner for guests — often home-cooked Okinawan food — which can be one of the more satisfying dining experiences available on the islands. It is worth asking your accommodation about meal options when booking. Self-catering is limited by the small size of local stores; bring any specialty items or dietary essentials from Naha if needed.

Alcohol is available, including the Okinawan spirit awamori, which is distilled from long-grain rice and is a staple of the region. Convenience store options are minimal compared to mainland Japan.

Money

The Kerama Islands operate on cash to a significant degree. While some larger guesthouses and shops may accept cards, do not assume card payment will be available everywhere. Withdraw sufficient yen in Naha before departing — ATMs on the islands are limited and may not accept foreign cards reliably. Verify locally.

Connectivity

Mobile signal exists on the main islands but can be patchy. Wi-Fi is available at many guesthouses though speeds vary. Download offline maps and any essential information before leaving Naha.

Medical and Emergencies

Medical facilities on the islands are very limited. Tokashiki has a small clinic; for anything serious, patients are transferred to facilities in Naha. Divers should be aware of the nearest recompression chamber — verify this with your dive operator before diving. Travel insurance that covers diving and medical evacuation is strongly recommended.

• Emergency (Police, Fire, Ambulance): 110 (Police), 119 (Fire/Ambulance) — standard Japan numbers
• Carry a basic first aid kit and any prescription medication in sufficient supply for your stay.

Coral Protection

Kerama Islands National Park has regulations aimed at protecting the reef ecosystem. Do not touch, stand on, or remove coral or marine life. Use reef-safe sunscreen. Follow all guidance from dive operators and posted notices at beaches.

The Kerama Islands are generally considered safe for travelers. Petty crime is rare. The primary safety considerations are environmental.

Ocean conditions can change rapidly, particularly during typhoon season (roughly June through October). Always check local weather and sea condition forecasts before water activities. Heed warnings from local operators and accommodation staff, who have reliable knowledge of local conditions.

Diving safety: Only dive with reputable, licensed operators. Ensure your certification is current and appropriate for the planned dives. Disclose any medical conditions honestly during dive briefings.

Typhoons: If a typhoon warning is issued, ferries will be cancelled and you may be stranded on the island for several days. Keep this in mind when planning your schedule and ensure your accommodation is confirmed for potential extended stays.

Sun and heat: UV intensity in subtropical Okinawa is high. Wear sun protection, a hat, and stay hydrated, particularly when hiking or on the water.

The Kerama Islands share the broader cultural heritage of Okinawa Prefecture, which has a distinct identity shaped by the historical Ryukyu Kingdom, geographic isolation, and its own language (Ryukyuan languages, distinct from standard Japanese). Many islanders speak standard Japanese, but the local cultural context is worth understanding before you visit.

Life on the islands moves at a pace tied to the sea and the weather. Punctuality and quiet respect for local residents are appreciated — the communities are small and the islands are people's permanent homes, not simply a tourist backdrop. Keep noise levels low in village areas, particularly at night.

Many guesthouses are family-run, and interaction with hosts can be a genuine highlight of a stay. A basic knowledge of Japanese phrases — greetings, thank you, please — is welcomed and useful, even if your hosts speak some English.

Religious sites including small shrines and utaki (sacred groves associated with Ryukyuan religion) exist on some islands. Treat these with the same respect you would any place of worship: do not enter restricted areas, photograph respectfully, and follow any posted guidance.