Okinawa: Naha: 1 day Kerama Islands diving‣ license required

The main draw is simple: you leave Naha by high-speed boat and spend the day at up to three Kerama Islands sites, usually around Tokashiki, Zamami, or Aka. These islands are known for clear water, coral, fish, and changing underwater terrain. The boat ride is part of the day, with other islands sliding past as you head into Kerama National Park.

I like that the operator owns two boats, which gives the crew more freedom to choose sites around the day’s sea conditions. I also like the practical extras: towels, full equipment, hot water showers, and free boat coats in cooler months. The main caution is consistency. Most reports praise the staff and underwater scenery, but one serious complaint involved worn equipment and weak safety communication, so I would ask to check your gear before leaving the port.

Key points to know before you book

• Three sites in one day: The plan is built around three underwater stops, with the crew choosing locations to suit conditions and your experience.
• Certified scuba only: You must hold a C-card and bring your certification and dive log. This is not an introductory lesson.
• Naha pickup is useful but limited: Hotel pickup is available within Naha city, though van seats can fill. The boat leaves at 8:00 AM.
• Seasonal extras change the mood: Whale watching is offered in winter, shaved ice in August and September, and mochi pounding takes place on January 1.
• Cold-weather preparation is unusually detailed: A 5 mm full suit, hooded vest, heated cabin, free boat coat, and hot Okinawa soba help take the edge off winter conditions.
• Check equipment and communication: English support is available, but language ability can vary by instructor, and equipment condition deserves your attention.

Leaving Naha for the Kerama Islands

This is a full-day boat outing priced at $129 per person, with roughly seven hours set aside for the trip. The day begins in Naha, either with hotel pickup or at the port if you arrange your own transport. Pickup applies only within Naha city, and the number of van seats is limited.

You need to give the operator your hotel name and address when booking. The exact pickup time is sent by email the day before, so check your messages. The boat departs at 8:00 AM, and Okinawa’s punctual schedule is not forgiving if you are still looking for breakfast when the van arrives.

The trip to the Keramas takes you away from Naha’s city edge and into open water. The high-speed boat is not just a shuttle. You get a moving view of the islands, and the ride helps make this feel like a proper day at sea rather than a short swim from the mainland.

The boat can carry both scuba participants and snorkelers. That mixed setup means the atmosphere may be livelier than on a small private charter. One account describes a large group, though scuba participants entered the water first. If you prefer quiet, personal attention, ask about the expected group size and instructor arrangement before paying.

Seasickness is worth taking seriously. If you know you are prone to it, use medication in advance rather than waiting until the boat is moving. You will spend substantial time on the water, and even a smooth day can feel different once the boat reaches open sea.

Three underwater sites around Tokashiki, Zamami, or Aka

The crew normally selects three sites around Tokashiki Island, Zamami Island, and Aka Island. You do not choose a fixed sightseeing circuit, because sea conditions, visibility, and the interests of the group affect the decision. That flexibility is one of the better reasons to book a boat-based trip.

You can tell the operator what you hope to see. Requests may include larger fish, smaller marine life, coral, or underwater terrain. The crew also says it can adjust guidance for different skill levels, including people who have not been underwater for some time.

The best reports describe clear water, coral, fish, turtles, and several attractive sites. One account singled out three excellent locations and colorful coral, while another described seeing many kinds of sea life. That is the Keramas at their best: the reward comes from variety across the sites, not from one guaranteed animal encounter.

Still, conditions can change. One participant found the second site mostly sandy, while another saw only a small turtle during three sessions. That is not necessarily a failure by the crew. Wildlife moves, visibility varies, and weather can force a change of plan. You should book this for the chance to see a healthy range of underwater life, not for a guaranteed turtle, ray, or whale.

The schedule is also fairly brisk. With three sites, boat travel, equipment changes, and a mixed group to manage, you may feel some time pressure. One positive account noted that scuba participants entered before snorkelers, but also felt the day moved quickly. If you need long surface intervals or extra time to handle equipment, tell the crew early.

The Chibishi Islands are not included. That matters if you are comparing several Naha boat trips, because some operators use Chibishi for shorter half-day outings. This one focuses on the longer Kerama route.

What is included, and what still costs extra

The $129 price includes full rental equipment, tanks, weights, a towel, tea, changing facilities, a hot water shower, a toilet, and a boat coat. A rental camera may also be available if reserved ahead of time.

That package is good value if you are flying into Okinawa and do not want to bring bulky gear. Tanks and weights are particularly useful inclusions, since those are awkward items to arrange independently. The towel, shower, and changing room also make the return to Naha easier.

Lunch is not automatically part of the basic price. A lunch option has been offered for an additional 1,000 yen, with Okinawa soba and oden available in the colder months. If you skip the lunch order, bring a packed meal. Cold tea is provided, and there is a cooling option for food you bring yourself.

Photography costs extra. A GoPro with an SD card is listed at 3,000 yen. A rental camera’s SD card costs 2,000 yen, though you can bring your own card. Reserve a camera in advance rather than assuming one will be waiting on the boat.

The price is strongest for a certified scuba participant who needs nearly everything supplied. It is less of a bargain if you already own equipment, want a private guide, or expect a quiet small-boat outing. The boat carries snorkelers as well, and the group size may be larger than you expect.

Equipment checks and instructor communication

The operator provides a full kit, but you still need to inspect it. Check the BCD, regulator, inflator, mask, fins, boots, and suit before the first session. One serious complaint described a faulty inflator and badly worn booties, with a replacement request reportedly refused. That is a significant safety concern, even though other accounts describe professional and patient instructors.

I would make your equipment request clear before boarding and repeat it during setup if anything feels wrong. A loose strap is one thing. A regulator, inflator, or BCD problem is another. You should not accept gear you cannot use confidently.

English and Japanese support are available. Staff are often friendly and helpful, and instructors such as Takashi have been praised for patience and clear care in the water. Koyama was also singled out as kind and supportive. At the same time, at least one experienced guide had limited English, creating problems during above-water explanations even though underwater communication was manageable.

That makes the briefing especially important. Ask about hand signals, the order of the sites, maximum depth, surface intervals, current, and what to do if you become uncomfortable. Do not assume every instructor will explain these points in fluent English.

There is also an environmental point that matters. You must not touch marine life, coral, or the bottom. I would like to see the crew give a firm briefing on this before entering the water, especially when beginners or snorkelers are aboard. Keep your hands and fins clear, and tell the staff if you see careless contact. Coral breaks easily, and a good day out should not come at its expense.

Winter comfort, whales, and New Year mochi

Okinawa’s air may average around 20°C in winter, while Kerama sea temperatures stay around 22°C. That can make the water feel more comfortable than the wind on the boat, but you still need protection between sessions.

The cold-weather setup is thoughtful. You wear a 5 mm one-piece suit with a 3 mm hooded vest underneath. A free boat coat, heated cabin, and engine heater are used to keep the boat interior near 25°C. Hot Okinawa soba and oden are available with the lunch order.

The boat coat is especially useful after you climb out, when wind can make you feel colder than the water did. Limited supplies are available, so request one when booking if you expect to feel cold.

Whale watching is offered on the Kerama route during the winter season, listed as January 12 or January 15 through March 31 in different booking notes. Confirm the exact start date for your chosen departure. The chance of seeing whales is described as high, but it is never guaranteed. Weather and sea conditions can prevent an observation, and this should be treated as a seasonal bonus rather than the purpose of the scuba day.

January 1 brings a distinctive local touch: the first underwater session is followed by traditional mochi pounding and an all-you-can-eat event. The food event applies to people who order lunch. If you are in Naha on New Year’s Day, this gives the trip a more memorable Okinawan flavor than a standard boat schedule.

In August and September, shaved ice is served. Free swim rings are also available when reserved, which may be handy for a companion who is not taking part in the scuba sessions.

What the day feels like for solo participants

You can book alone, and the operator runs the boat even for one person. That is useful in Okinawa, where many water activities require a pair or a minimum group.

The social side depends on the day’s mix. One solo participant felt included, found the staff friendly, and enjoyed meeting other people on the boat. Another account describes a large group, so you should not expect the attention of a private trip. Still, the crew aims to match guidance to experience, and solo booking is clearly accepted.

This suits a certified person who wants a straightforward day without organizing tanks, a boat, and sites independently. It also suits someone returning to scuba after a long break, provided you are honest about your experience and medical condition.

It is not designed for uncertified beginners. You need a C-card, and you should bring your dive log. Children under 10 cannot participate, and minors need parental consent. Pregnant people, wheelchair users, people with heart, respiratory, blood pressure, seizure, kidney, or mobility problems, and people with recent surgery are listed as unsuitable. Anyone with a cold or other medical concern should ask a qualified professional before booking.

Seasonal planning and small practical details

Bring swimwear, a change of clothes, sunscreen, sunglasses, personal medication, your certification, and dive log. Pack lunch unless you have ordered the provided option. A waterproof bag for dry clothing would also be sensible, though it is not specifically listed as required.

Smoking is not allowed in the vehicle. Fishing, alcohol, drugs, pets other than assistance dogs, weapons, sharp objects, oversized luggage, fireworks, and touching marine life are prohibited. You also cannot bring an unaccompanied minor.

If you drive to the port, customer parking is available. Port meeting may involve paid parking at 500 yen per day. If the pickup van is full, you may need to meet at the port instead, so do not assume hotel transport is guaranteed just because your hotel is in Naha.

Weather can change the destination or cancel the plan on the day. That is normal for an open-water trip, but it matters if this is your only Okinawa activity. Keep a backup plan that does not depend on calm seas.

The stated cancellation policy allows a full refund when you cancel at least 24 hours ahead. You can also reserve and pay later, which is useful while you watch the forecast and settle your Okinawa schedule.

Should you book this Kerama scuba day?

I would book it if you are already certified, want three sites in one long day, and value transport, tanks, weights, towels, and seasonal extras in one package. The strongest reports point to patient staff, beautiful coral, good visibility, and memorable boat time. Guides such as Takashi and Koyama have earned specific praise for their calm support.

I would hesitate if you need highly detailed English briefings, pristine rental gear, a small private group, or guaranteed wildlife. Ask about the assigned instructor, group size, current equipment condition, lunch, and exact whale-watching dates before you confirm.

At $129, this is a reasonable way to reach Kerama National Park from Naha, especially if you need rental equipment. Go with realistic expectations, inspect every piece of gear, take seasickness precautions, and remember that the sea chooses the day’s sightings.

FAQ

Do I need a scuba certification?

Yes. This activity is only for people with a C-card. Bring your diving certification and dive log.

Is hotel pickup available?

Pickup is available within Naha city, but van seats are limited. You must provide your hotel name and address when booking. If pickup is full, or if you stay outside Naha, you will meet at the port or designated location.

What time does the boat leave?

The boat departs at 8:00 AM. The pickup time is sent by email the day before, so check your messages and be ready outside your hotel.

How many underwater sessions are included?

The crew plans three sessions at sites around Tokashiki, Zamami, or Aka, depending on conditions and the day’s plan.

Is lunch included?

Lunch is not included in the basic activity price. An additional lunch option has been offered for 1,000 yen. If you do not order it, bring a packed lunch.

Is whale watching guaranteed in winter?

No. Whale watching is included on the Kerama route during the seasonal period, listed in the booking information as January 12 or January 15 through March 31. Weather and sea conditions may prevent sightings.

What equipment and facilities are provided?

Full rental equipment, tanks, weights, a towel, tea, a changing room, a hot water shower, a toilet, and a boat coat are included. A rental camera requires advance reservation, while GoPro rental and SD cards cost extra.