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

Kerama waters are a one-day wonder. This Naha trip mixes a fast boat ride with a full scuba certification requirement, guided underwater stops around Tokashiki, Zamami, and Aka, and seasonal surprises that change by month.

I particularly like the way the day is run, with the operator using its own boats to keep things flexible and choose the three best underwater spots of the day. I also love the calendar-based perks, like the mochi pounding event on January 1st and shaved ice in August and September.

The main drawback to consider is variability. Some feedback points to crowded boats, weaker-than-expected briefings, and occasional gear issues, so if you are picky about safety talk and equipment condition, plan to speak up early and check your kit.

Key things to know before you go

• Early 8:00 AM departure from the port means you should be ready the night before, especially for pickup limits inside Naha city.
• Certification required (C-card), and the day is designed for your level, including beginners returning after a break.
• Cold-season comfort is real, with heated boat gear and water temperature staying above 22°C.
• Seasonal extras include mochi pounding on January 1st, whale watching in the winter window, and shaved ice in summer.
• You get the full setup: tanks and weights included, plus towel, shower, changing room, and a boat coat.
• Three underwater stops are planned carefully, but marine life sightings and visibility can still vary by weather and site.

Kerama Islands, built for a full day at sea (without the long wait)

Kerama Islands is the kind of place where you can feel the “special Okinawa” quickly. You leave Naha in the morning, run out to Kerama National Park, and spend the bulk of the day doing guided underwater sessions around Tokashiki, Zamami, and Aka. It is a straightforward format, not a complicated itinerary maze.

What makes it appealing is that the day is engineered around the ocean conditions. The operator notes that it owns two boats, which matters because it helps them keep the schedule moving and select the “best three spots” of the day. In plain terms, that is how you reduce the chance of getting stuck with an average plan when the sea is acting up.

You also get extra fun that changes with the season. On January 1st, the first underwater session lines up with a traditional mochi pounding and an all-you-can-eat event. From January 12th (and sometimes listed as January 15th) through March 31st, whale watching is included on the Kerama route, and in August and September you can grab shaved ice after lunch.

The one thing to keep your expectations grounded: whales are not guaranteed, and weather can force a change in destination or schedule.

From Naha pickup to the port, this is a tight 7-hour rhythm

The day moves fast, so you should treat it like an all-day morning commitment. Pickup is available within Naha city, but there is a seat limit. If your hotel is outside Naha city, you will meet and disband at the location instead, and you need to provide your hotel name and address when booking.

The boat leaves at 8:00 AM. That means your best move is to not “assume” your pickup timing. Get outside your hotel when they contact you the day before, and double-check your email message with the meeting time.

The schedule is simple:

• Van ride from Naha (about 1 hour)
• Time in Kerama National Park (about 6 hours) for guided underwater sessions
• Van ride back (about 1 hour)

Here is why I like that structure: it keeps your planning easy. You are not bouncing between multiple locations or chasing separate tours. One morning, one stretch of ocean time, one return.

If you are traveling solo, you can still join. The tour is also set up to respond to your experience level, with instructors carefully adjusting how you do the underwater session.

Inside the boat: equipment, heaters, and boat coats for cold days

This tour is unusually focused on comfort for winter, at least on paper and in how the trip is designed. The average winter air temperature in Okinawa is around 20°C, but the sea temperature in the Kerama Islands never drops below 22°C. That means you are mostly dealing with “cold air outside,” not “freezing water.”

On top of that, you wear a system of wetsuit layers, including a 3mm hooded vest under a 5mm one-piece. Then you get a free boat coat, which you can wear over your wetsuit. There are also cabin and engine heaters, aiming to keep the inside of the boat around 25°C.

Why this matters to you: it can change how confident you feel. If you are less tense from cold, your breathing and movements usually get better. It also makes it easier for people who have been away from underwater activities for a while.

Included basics that make the day easier:

• Full rental equipment including tanks and weights
• Towel
• Tea
• Changing room
• Hot water shower
• Toilet
• Boat coat

One note for your planning: the boat coat and other “cold weapon” comfort items can be limited. If you know you run cold, ask staff during check-in or mention it when you reserve.

The underwater plan: three planned stops near Tokashiki, Zamami, and Aka

You spend about 6 hours total in Kerama National Park, with an instructor guiding you through your underwater plan. The operator states it will choose three of the best points of the day and guide you based on your level.

You should also know what this tour is not. Chibishi Islands are not included on this itinerary. If you are hoping for Chibishi specifically, you will need a different half-day option.

What you can realistically expect underwater is “classic Kerama”: you are in an area known for colorful coral and lots of fish, and visibility can be great on the right day. Some feedback includes vivid sightings like turtles and good coral life, and at least one person reported the second stop having mostly sand, so the underwater highlights can vary by site.

For best odds of a satisfying day:

• Come with a certification card ready (C-card required).
• Tell your instructor what you want to focus on: bigger fish, smaller fish, or how the terrain feels under you.
• If you are returning after a break, mention that early. The operator says it adjusts the style so you can enjoy it with peace of mind.

Also, the tour includes a reminder: you are guided to avoid touching marine life. That is a big one for reef health, and one piece of feedback criticized how others handled that. Your best defense is to follow your guide’s instructions even if you see others getting careless.

Seasonal extras: mochi pounding, whale watching, and shaved ice

This is where the tour feels less like a generic package and more like a Kerama day with Okinawa flavor.

January 1st: mochi pounding plus all-you-can-eat

On January 1st, the traditional mochi pounding and all-you-can-eat event happens, and it lines up with the day’s first underwater session. If you love cultural traditions that are actually scheduled into the outing, this is a rare setup.

Winter whale watching window

Whale watching is included for a limited season. The info gives a window from January 12th to March 31st, and a second notice cites January 15th to March 31st. The safe takeaway is this: it is included in the mid-January to late-March period, and sightings depend on weather and sea conditions.

I like that they are upfront about the uncertainty. On the ocean, you cannot force animals to show up. What you can do is go prepared for a “maybe, but worth it” experience.

August and September shaved ice

In August and September, shaved ice is available. It is a small thing, but it is one more reason this tour feels like a full day rather than just a checklist.

There is also mention of free swim ring rentals. If you want one, you need to reserve.

Price and value: what $129 really covers

At $129 per person for a 7-hour day, the value mainly comes from what is bundled.

Included at this price:

• Full rental equipment, including tanks and weights
• Towel, tea, changing room
• Hot water shower and toilet
• Rental camera (reservation required)
• Boat coat
• Whale watching during the winter window
• Shaved ice in August and September
• Transportation support, with pickup inside Naha city

Not included:

• GOPro rental for 3,000 yen, with an SD card
• Rental camera SD card for 2,000 yen (you can bring your own)

Here is how I’d judge the value for you. If you want the comfort factor (shower, changing room, boat coat, heated boat), plus gear handled for you (tanks, weights, rental setup), the price makes sense. If you already own most gear and you are only hunting underwater photos, you might feel the camera extras are secondary. But since the tour also provides a rental camera by reservation, that part can still be useful.

One practical note: the rental camera SD card is extra. If you want to avoid last-minute decisions, plan for it when you book.

Who should book, and who should skip this Kerama day

This trip is built for people who can handle open-water conditions and certification rules.

Good fit:

• Certified divers with a C-card
• People with past underwater experience who just want a guided day back in the water
• Solo travelers, since the day can still work even if you go alone
• Anyone who wants a day trip from Naha without complicated logistics

If you should think twice or skip (listed as not suitable):

• Children under 10
• Pregnant women
• People with mobility impairments, wheelchair users
• People with vertigo
• People with respiratory issues, epilepsy, or serious pre-existing medical conditions
• People with heart problems, kidney problems, high blood pressure, recent surgeries, or diabetes
• People with a cold
• People who are visually impaired or have specific medical limitations listed by the provider
• People who cannot meet certification requirements
• Babies under 1 year, and people over 95

Also important: the boat is an open-water experience with the usual ocean risks. If you are prone to seasickness, the tour suggests using anti-sickness medicine in advance.

Practical tips that can improve your day fast

You do not need to overthink this day, but a few details can save you time and stress.

What to bring

Bring:

• Sunglasses
• Swimwear
• Change of clothes
• Sunscreen
• Packed lunch
• Personal medication
• Diving certification (your C-card)
• A logbook (the info lists a dive log)

Even though packed lunch is listed, the cold-day plan mentions hot Okinawa soba and oden for lunch, and the operator also mentions asking for extra warm help if you still feel cold. So you should plan to bring lunch, then take advantage of the hot options if they are offered that day.

Seasickness planning

If you tend to feel sick on boats, do not wait until you feel bad. The tour’s guidance is to use anti-sickness medicine in advance.

Underwater rules

Touching marine life is not allowed. One critical comment in the feedback complained about novice behavior on a snorkel group, so keep it simple: follow your guide, keep hands off the reef, and treat your buoyancy skills as your priority.

Cameras and photo gear

A rental camera is included if you reserve it, but the SD card is not included. GOPro rental is possible for an extra cost, and it comes with an SD card.

Swim rings

Swim ring rentals are free, but you need to reserve.

How to avoid the common pitfalls in the feedback

The overall rating is decent, but the feedback is not uniform. There are strong experiences where staff were patient and guided well, and there are also unhappy reports about crowded boats, safety briefing gaps, and equipment condition.

Use that information like a smart traveler:

• Ask your questions before you go under the surface, especially about safety and what to do if you feel out of control.
• At the gear check, inspect BCD and your footwear condition. One report described torn booties and a BCD inflator problem that was not resolved for that person.
• If English communication matters for you, pay attention to the guide and ask for clarification if you do not understand. The feedback includes examples where English worked well, and examples where it was limited.

On the positive side, at least two guide names show up in feedback: instructor Koyama and instructor Takashi. If you see your assigned instructor on your confirmation, that is worth noting, because their patient teaching style is directly mentioned.

Should you book this Kerama Islands scuba day trip from Naha?

Book it if you want:

• A one-day Kerama outing that includes gear, heaters and boat coats for winter comfort, and a structured plan around Tokashiki, Zamami, and Aka
• Seasonal Okinawa extras like mochi pounding on January 1st, whale watching in the winter window, and shaved ice in late summer
• A tour that can work for beginners coming back after time away, with instructors adapting to your level

Skip or reconsider if:

• You need a guarantee on marine sightings, since whale watching depends on weather and sea conditions
• Safety briefings and equipment condition must be perfect for you. This can vary day to day, and the feedback includes serious complaints about overcrowding and briefing quality

If you do book, your best move is to arrive prepared, speak up during gear check, and ask clear questions about what to do in the water. Do that, and the Kerama day can be one of the best value-packed experiences you do in Okinawa.

FAQ

Do I need scuba certification (C-card)?

Yes. The activity is only for people with a C-card, and it is not suitable for those without certification.

How long is the tour and what time does the boat leave?

The tour is about 7 hours total, and the boat departs at 8:00 AM.

Is pickup available from any hotel in Okinawa?

Pickup is only available within Naha city, and it is limited by seat availability. If you stay outside Naha city, you will meet and disband at the location.

What equipment and facilities are included?

Full rental equipment is included, including tanks and weights. You also get a towel, tea, changing room, hot water shower, and toilet access.

Is a camera included?

A rental camera is included if you reserve it. The camera SD card is not included, and it costs 2,000 yen if you need one. You can also rent a GOPro for 3,000 yen with an SD card.

Does the tour include whale watching?

Yes, whale watching is included for a limited seasonal period, from January 12th to March 31st. One notice lists January 15th as the start, and sightings depend on weather and sea conditions.

When is shaved ice available?

Shaved ice service is available in August and September.

Are swim rings available for free?

Yes. Free swim ring rentals are available, but reservations are required.