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Japan / Okinawa
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Marine House Seasir Akajima

You will be staying with:

You will be diving with:

Marine House Seasir Akajima

3 star hotel
162 AkaZamamison, Aka, Zamami, Okinawa, Okinawa 901-3311, Japan
17 rooms
No Internet


PADI 5 star dive center
Max 6 divers per guide

Package highlights

  • Marine House Seasir Akajima offers snorkeling and diving in one of the planet's clearest waters, with pretty coral reefs and incredible biodiversity
  • Under the waves of this stunning archipelago, you'll experience some of the best diving conditions in the world - it's a mecca for marine life photographers
  • Join an excursion to see the humpback whales that are spotted in Okinawa every winter, from December to April
  • At the end of the day, soak away your aches and pains in the rooftop hot tub
  • The ideal trip for divers looking to blow bubbles in the Pacific by day and slurp noodles and sip Sake by night
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Dates & Prices

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You only need to pay 48h after your booking is confirmed.

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Booking process


Once we receive your booking, we double check availability with the dive operator and reserve your spot


We usually get back to you within 24 hours to confirm that your booking is final


You then have 48 hours to take care of other travel arrangements. Your credit card will only be charged after that period

Payment & cancellation

Payment terms

  • Now: 0%
  • 48 hours after booking confirmation: 100%

Cancellation fee

Free cancellation for 48h after confirmation

STANDARD CANCELLATION POLICY: If you cancel more than 7 days before the start of your trip, you will lose 0% of the total booking, 30% for more than 3 days, 50% for more than 1 day and 100% if you cancel within 1 day of your trip.

SPECIAL CORONAVIRUS (COVID-19) CANCELLATION POLICY: No cancellation fee will be charged on bookings made after 3 March 2020, if trips are affected by COVID-19.

Explore diving around the Marine House Seasir Akajima

Best dive sites in Okinawa

Yosuji-no-ne, Okinawa (main island) – This dive site is named after the yosuji, or blue-banded snapper that inhabit this spot in large schools at depths of 24 metres/80 feet. Here, divers will find luminous cardinalfish, sea goldies and schooling bannerfish, which like to group around rocks at depths of 16 metres/50 feet. USS Emmons, Okinawa (main island) – This Gleaves-class destroyer was sunk in a kamikaze attack in April 1945, killing 60 American crew and five Japanese pilots. Suitable only for experienced divers, Emmons sits between 36 to 45 metres/120 to 150 feet and is still property of the United States Navy. At this fascinating site, divers will get to see the ship’s cannons, screws, ammunition, machine guns and the helmet of a soldier. Yonaguni Monument, Yonaguni Island – This amazing formation is located off the westernmost coast of Japan. Controversy surround the ruins, also referred to as the “Yonaguni Pyramid,” as experts disagree whether the formations are man-made relics of an ancient sunken civilization or naturally occurring geological structures. The mysterious site sits approximately 30 metres/100 feet beneath the surface and features step-like rocks and formations that look like footpaths and amphitheaters. Aside from the geological scenery, Yonaguni is also on the migration path for hammerhead sharks, which pass through in numbers from November through June. Tonbara, Kume Island – This point has a dramatic underwater landscape of large rocks covered in corals. After making their way around the huge rock reef to Tonbara Rock, divers can find large fish such as giant trevally, dogtooth tuna and bigeye trevally. During winter, hammerhead sharks also visit this area. Fudensachi, Aguni Island – Affected by the Kuroshio Current, also known as the “Black Tide,” diving at Aguni Island is recommended only for strong swimmers and experienced divers due to its strong currents. During summer, thousands of bigeye trevally and dogtooth tuna migrate pass Aguni. Other common visitors include horse-eye jacks, tuna, Napoleon fish, sharks and hawksbill turtles. Yabiji, Miyako Island – This dive spot is only exposed to the open air once a year, which has caused it to earn the nickname “Phantasmal Island.” The reef shelf has a depth of six metres/20 feet to 10 metres/33 feet, and is covered in its entirety with table corals and branch-shaped corals on which colorful fish and crustaceans live. Divers may also chance upon a manta ray! Ishizaki Manta Scramble, Ishigaki Island - Also known as “Manta Point,” manta rays are frequent visitors in this area. Hovering gracefully above the coral reef, this is truly an awesome site to behold – suitable for divers of all levels, Manta Point ranges in depth from eight to 16 metres/25 to 50 feet. Although mantas visit year-round, they are most commonly seen from July through September.
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What to see

Thanks to the subtropical temperatures, Okinawa has a rich diversity and many marine species can be found year-round including: anthias, butterflyfish, boxfish, pufferfish, clownfish, moray eels, octopuses, cuttlefish, sea turtles and manta rays. Divers frequently report seeing large schools of dogtooth tuna and bigeye trevally. During winter, humpback whales visit the seas of Okinawa to breed; however, during this season there is a high possibility of encountering vessels.

Dive Center


  • Snorkel and dive in one of the clearest waters on Earth, with pretty coral reefs and incredible biodiversity
  • Night dives, fun dives and a full range of PADI course are on offer, and Nitrox and full scuba gear are available to rent
  • Join an excursion to see the humpback whales that are spotted in Okinawa every winter, from December to April
  • The friendly and experienced instructors conduct courses in Japanese, English, Mandarin and Cantonese


Seasir Divers is a 5* PADI scuba diving center on the Aka Island of the Kerama Archipelago.

Seasir Marine House is the largest dive operator in Okinawa and has been in operation since 1983. They have English and Chinese-speaking dive guides and tend to keep language groups together.

They have plenty of well-maintained equipment for hire and for sale, onsite accommodation, with outdoor showers and washing area for gear, as well as a roof-top hot tub and hot showers.

From fun dives and night dives, to snorkeling and PADI training courses, the multi-lingual team have you covered.

The center has been receiving the Dive and Travel Award from the dive magazine Marine Diving, ranking them at no.1 for 11 consecutive years. 

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Diving gear

  • Tanks With Int (Yoke) Valves
  • Tanks With Din Valves
  • Din/Int Adapters
  • Filling Station

Diving Facilities

  • Shop
  • Fish Id And Diving Books

PADI® Courses Available

  • Intro Dives/Discover Scuba Diving
  • Scuba Refresher
  • Open Water Diver
  • Advanced Open Water Diver
  • Rescue Diver
  • Divemaster
  • Deep Diver Certification
  • Boat Diver
  • Peak Performance Buoyancy
  • Other Specialties

Languages spoken

  • English
  • Japanese

PADI membership level

  • Padi 5 Star Dive Center
  • Padi Dive Resort
  • Padi 5 Star Dive Resort
  • Padi 5 Star Idc Resort
  • Padi 5 Star Cdc

For your safety

  • Emergency Oxygen Kit
  • First Aid Kits

Resort Amenities


  • Cultural Excursions

Sports & Watersports

  • Snorkeling


  • Restaurant


  • Visa
  • Mastercard
  • Cash (Local Currency)

Amenities & services

  • Air-Conditioning

Food & drink

  • A La Carte
  • Alcohol
  • Vegetarian Food

Resort Description

Marine House Seasir Akajima offers superb dive facilities, simple Japanese rooms, a restaurant, and rooftop hot tub.

Most of the rooms at Marine House Seasir are designed following the Japanese Tatami concept, and feature a minimalist style, a small table and TV. 

The beach is only a minute walk away and the 5* PADI dive center is on site, where you'll find plenty of well-maintained equipment for hire and for sale, outdoor showers and a washing area for your gear.

AKA Island is surrounded by crystal clear blue sea water, making it ideal for lovers of underwater photography - the area has attracted many award-winning marine life photographers over the years, for this very reason.


How to get there


  • Fly to Naha Airport on Okinawa Island. 
  • From there you should make your way to Tomari Port. You can reach the port via train to Meibashi then walking, or catching a taxi at the airport (estimated taxi fare - JPY2,000). 
  • At Tomari Port, board the ferry to AKA Port (the journey will take between 60 and 90 minutes). Cool Okinawa Travel will assist you in reserving your tickets via their website (https://coolokinawa.com/en/plan/detail/5/)
  • The resort will arrange to pick you up from the ferry terminal on the other end for no additional fee (advance notice required). 
  • Please note: if your flight lands in Okinawa later than 1 pm, you will need to stay overnight on the main island and travel to AKA Island the following day. 
  • Check in time is 4 pm. 


  • Check out time is 10 am. 
  • After check out, the team will take you back to AKA port (advance notice required, additional cost). 



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