When does the Amami Oshima Sea open? Introducing the crystal clear ocean and snorkeling spots
Check out the sea opening at Amami Oshima!
Come enjoy the crystal-clear ocean!

Amami Oshima is a tropical island known for its clear waters and rich coral reefs, where many tourists come to enjoy snorkeling and swimming.
However, "When does the ocean open?"How long can I swim?Many people may have questions such as, "What is the best way to get the best results?
Here, we’ll provide an easy-to-understand guide to the start of the swimming season on Amami Oshima, traditional events, the beach season, and beaches with crystal-clear waters!
◆For those who want to know about the clear waters and beaches of Amami Oshima
◆For those who want to know when the Amami Oshima Sea opens and how long you can swim.
◆Those who want to check the opening of the sea and the charm of the sea for sightseeing in Amami Oshima Island.
◆Those who want to enjoy swimming and snorkeling in Amami Oshima Island.
↓Click here to read the article.
7 Recommended Snorkeling Spots on Amami Oshima | Best Times to Visit, Hidden Gems, and Tips for Staying Safe Snorkeling in the warm waters of Amami Oshima! Amami Oshima Island has a mild subtropical climate with an average annual temperature of about 22℃. A wide variety of creatures live in the sea of Amami Oshima, and you can observe them up close [...].Click here for the ranking of popular tours to Amami Oshima Island
When does the Amami Oshima Sea open?
Holding period and traditional events

On Amami Oshima Island, instead of opening the sea just before summer like on the mainland, the traditionalSea opening to coincide with traditional eventsis done by the company!
The Umi-no-Opening, which is tied to the unique culture of Amami, has been passed down as an important event for the local people.
Here, we'll introduce the timing and significance of the beach opening, as well as events that tourists can enjoy!
Let's enjoy Amami Oshima to the fullest!
↓Click here for popular plans for Amami Oshima.
Trekking in Kanasakubara Wilderness & Mangrove Canoe Tour☆An extraordinary experience to fully enjoy the great nature <Cancellation free until the day before> (No.189)開始時間9:00-16:00所要時間Approx. 7 hours11,550 yen →directional marker or indicator9,900suffix for names of swords, armour, musical instruments, etc.
Amami Oshima Island/1 day】Snorkeling & mangrove canoeing with sea turtle encounter rate of 98% (with pickup and drop-off, shower and other facilities) (No.31)開始時間Negotiable所要時間Approx. 8 hours14,000 yen →directional marker or indicator13,000suffix for names of swords, armour, musical instruments, etc.
Special Autumn SALE 【Amami Oshima/Half Day】You can charter a private boat! Waterfall Walk & Mangrove Canoe Tour to be healed in mysterious space 《small group, free cancellation until 2 days before》(No.75).開始時間9:00-12:30 / 14:00-17:30所要時間Approx. 3 hours and 30 minutes10,300 yen →directional marker or indicator8,800suffix for names of swords, armour, musical instruments, etc.Click here for the ranking of popular tours to Amami Oshima Island
The Amami Oshima sea opening is on March 3 of the lunar calendar
Held in "Sangatsu Sanchi

The opening of the sea on Amami Oshima takes place on the 3rd day of the 3rd month of the lunar calendar.Sangatsu SantiThe event will be held in conjunction with the event called
This day has long been cherished as a day to pray for safety at sea and a good catch.
In some areas, rituals and prayers are held on the beach,Traditional Culture of Gratitude for the Blessings of the SeaIt continues to this day as a
*The date changes every year because it is held according to the lunar calendar, and in 2026 it will be held on April 19.
What is the Hamauore (beach festival) held at the opening of the sea?

Hamaore is a traditional event in the Amami region, where families and local people gather on the beach to enjoy the sea breeze.
It was once known as an event for women to purify themselves in seawater.
Today, it is a popular culture to enjoy a meal by the sea like a picnic, and has become a springtime tradition in Amami.
Can tourists participate in the Amami Oshima sea opening?

In many cases, tourists can participate in Amami Oshima's ocean-opening events, where they can pray for safety on the beach and observe local traditional events.
Depending on the region, there may be music, dancing, and social events—a valuable opportunity to experience Amami culture!
This event is a popular way to feel the beginning of the tourist season.
How long can we swim in the sea of Amami Oshima?

Because of its mild subtropical climate, Amami Oshima Island offers a longer period of ocean fun than Honshu.
Although the beach opens in the spring, the actual time of year when swimming and snorkeling can be done comfortably is slightly different.
Here we explain when you can swim in Amami Oshima, the sea water temperature, and the best season for marine sports.
Enjoy the sea of Amami Oshima!
↓Click here for popular marine sports plans.
Amami Oshima/Setouchi Town/3 hours] Enjoy the sea of Amami☆All-you-can-eat 5 kinds of popular marine sports (No.9)開始時間9:00-12:30 / 13:00-16:30所要時間Approx. 3 hours16,000 yen
Southern Amami Oshima Island] Experience the exhilaration of marine sports! Towing tube experience (No.35)開始時間Every hour from 9:00 to 16:00所要時間Approx. 1 hour5,000 yen
Amami Oshima] Beginners can also have fun with a good lecture! Wakeboarding experience (No.37)開始時間Every hour from 9:00 to 16:00所要時間Approximately 45 min.7,000 yenClick here for Amami Oshima Marine Sports Experience Tour
When is the best time to swim in Amami Oshima?

On Amami Oshima, people can be seen entering the ocean from spring when the temperature begins to rise, and the bathing season generally lasts from early summer to fall.
The sea water temperature is especially high from June to October, when many tourists enjoy snorkeling and diving.
Because of the warm climate,Enjoy the sea for a long period of timeThat's the appeal!
Enjoy the sea of Amami Oshima!
↓Click here for popular diving plans
Amami Oshima/Northern Japan] 20 minutes from Amami Airport! Beginners welcome☆Focus on satisfaction♪Half day tour to experience diving on the beach in Amami Oshima Island (No.53)開始時間8:30-11:30 / 14:00-17:00所要時間Approx. 3 hours13,200 yen
Amami Oshima/South part of the island/3 hours] Beginners are welcome☆Filled with surprises and excitement! Experience Diving Tour in Amami Blue (No.50)開始時間9:30 a.m. - 12:30 p.m.所要時間Approx. 3 hours15,400 yen
Amami Oshima/Northern Japan】Beginners welcome to skin diving tour 《Free photo and video gift》Experience the excitement of Amami Blue☆ (No.139)開始時間Half-day] 9:00-11:30 / 13:00-15:301 day】9:00-15:00 所要時間Half a day: 2 to 3 hours1 day] 6 hours8,500 yen →directional marker or indicator8,000suffix for names of swords, armour, musical instruments, etc.Click here for Amami-Oshima diving tours
Can we swim even in March? Sea water temperature and climate of Amami Oshima Island

The average temperature on Amami Oshima in March is relatively high, and on sunny days, the weather is pleasant by the sea.
However, since the sea water temperature is still somewhat low, it is a little early for full-scale sea bathing.
Wearing a wetsuitSnorkeling and other marine activities are also available!
Enjoy the sea of Amami Oshima!
↓Click here for popular snorkeling plans
Amami Oshima Island/1 day】Snorkeling & mangrove canoeing with sea turtle encounter rate of 98% (with pickup and drop-off, shower and other facilities) (No.31)開始時間Negotiable所要時間Approx. 8 hours14,000 yen →directional marker or indicator13,000suffix for names of swords, armour, musical instruments, etc.
Amami Oshima/Northern part of Japan】Beginners are also welcome☆High probability of seeing sea turtles snorkeling 《Comfortable with a waterproof suit in winter! (No.140)開始時間Half-day] 9:00-11:30 / 13:00-15:301 day】9:00-15:00 所要時間Half a day: 2 to 3 hours1 day] 6 hours7,500 yen →directional marker or indicator7,000suffix for names of swords, armour, musical instruments, etc.
Amami Oshima Island / 2 hours / private tour] The moment of excitement☆Sea turtles snorkeling! Free photo and movie (No.144)開始時間9:00 / 9:30 / 10:00 / 13:30 / 14:00 / 15:00所要時間Approx. 2 hours10,000 yenClick here for Amami Oshima snorkeling tour
Snorkeling and marine sports.
Best Season

If you want to enjoy snorkeling or diving on Amami Oshima, the best time to visit is from summer through fall, when the water temperature is stable!
During this time of year, the water is crystal clear, making it easy to observe coral reefs and tropical fish.
Because sea conditions are calm on many days, it is an easy time for beginners to enjoy marine sports.
Is the sea of Amami Oshima beautiful? Explanation of transparency and attractions

The sea of Amami Oshima is beautiful.Emerald blue seaIt is known as a "place to be" and attracts many travelers.
The clear waters are ideal for snorkeling and diving, and the rich natural environment that remains is a major attraction.
Here we explain the clarity of the Amami-Oshima sea, its actual rating, and its natural attractions.
↓Click here to read the article.
10 popular beaches in Amami Oshima! Popular activities to enjoy the beautiful sea of Amami! What are the characteristics of the sea on Amami Oshima Island? Amami Oshima Island, with its mild climate throughout the year, is a popular tourist spot where you can enjoy many activities such as marine sports and snorkeling. The ocean around Amami-Oshima is characterized by the Kuroshio Current, which flows from the south [...].Click here for the ranking of popular tours to Amami Oshima Island
Reasons for the high transparency of the sea on Amami Oshima Island

One of the reasons why the sea of Amami Oshima is said to be beautiful is that the island is surrounded byCoral reefs are spreading.This is to say.
Coral reefs not only enrich the marine ecosystem, but also help maintain high water clarity.
The lack of large rivers means that there is little sediment flowing into the sea, which also contributes to the high level of transparency.
Is the sea of Amami Oshima dirty? Actual reviews and reputation

On the Internet, you may see searches such as "Amami-Oshima Sea dirty," but in reality, many beaches maintain a high level of transparency.
However, it can be muddy depending on weather and wave conditions, and the impression may vary from place to place.
On a sunny day at the beachEnjoy the clear blue seaThat happens a lot!
Attraction of the Amami Sea where coral reefs and sea turtles can be seen

In the sea of Amami Oshima, you can see diverse marine life such as coral reefs and tropical fish.
Depending on the locationYou can meet sea turtles.It is also a popular snorkeling spot.
Amami Oshima, with its vast ocean teeming with natural beauty, offers stunning seascapes unique to a region designated as a World Natural Heritage Site!
Amami-Oshima Island Recommended Sea for Snorkeling

Amami Oshima Island has many beaches with crystal clear waters and plenty of good snorkeling spots!
Each beach has its own unique characteristics, ranging from places where even beginners can play safely to secluded beaches rich in nature.
Here.Popular snorkeling spotsLet me introduce it!
Enjoy the sea of Amami Oshima!
↓Click here for popular snorkeling plans
Amami Oshima Island / 2 hours / private tour] The moment of excitement☆Sea turtles snorkeling! Free photo and movie (No.144)開始時間9:00 / 9:30 / 10:00 / 13:30 / 14:00 / 15:00所要時間Approx. 2 hours10,000 yen
Southern Amami / approx. 2 hours] Participation OK from 4 years old! Recommended for travelers with children.開始時間9:00-12:00 / 14:00-17:00所要時間Approx. 3 hours11,000 yen
Amami Oshima Island/3 hours] Beginners welcome☆Boat snorkeling on a deserted beach! Let's go meet colorful tropical fish and sea turtles♪ 《Participation OK from 5 years old, photo data included》(No.190).開始時間(1) 9:00 - 12:00 / (2) 12:00 - 15:00 / (3) 15:00 - 18:00所要時間Approx. 3 hours8,800 yenClick here for Amami Oshima snorkeling tour
Snorkeling spots where you can see sea turtles

There are waters around Amami Oshima Island that are known as a habitat for sea turtles, which may be encountered while snorkeling.
In an area of calm bays and coral reefs, visitors can experience swimming with colorful tropical fish.
Feel the natural sea up close.It is popular as a valuable spot.
You can meet sea turtles!
↓Click here for the Amami Oshima Sea Turtle Experience Plan.
Amami Oshima Island/1 day】Snorkeling & mangrove canoeing with sea turtle encounter rate of 98% (with pickup and drop-off, shower and other facilities) (No.31)開始時間Negotiable所要時間Approx. 8 hours14,000 yen →directional marker or indicator13,000suffix for names of swords, armour, musical instruments, etc.
Amami Oshima/Northern part of Japan】Beginners are also welcome☆High probability of seeing sea turtles snorkeling 《Comfortable with a waterproof suit in winter! (No.140)開始時間Half-day] 9:00-11:30 / 13:00-15:301 day】9:00-15:00 所要時間Half a day: 2 to 3 hours1 day] 6 hours7,500 yen →directional marker or indicator7,000suffix for names of swords, armour, musical instruments, etc.
Amami Oshima Island / 1 day / Charter] Safe & Exciting☆Sea turtle snorkeling & mangrove canoeing! Guided by islanders who know Amami well 《Photo・video free of charge》(No.142).開始時間9:00-16:00 / 10:00-17:00所要時間Approx. 7 hours20,000 yen Sea Turtle Experience Plan/Activity Tours
click here
Beach for beginners and family trips.

Amami Oshima Island hasBeach with shallow water and calm wavesThere are also many family trips and beginners can enjoy playing in the sea without worries.
Some well-equipped beaches have parking lots and showers available.
It's a popular spot among tourists because it's such an easy way to enjoy the crystal-clear ocean!
Cape Ayamaru saltwater swimming pool
The Ayamaru Cape seawater pool in the northern part of Amami Oshima has shallow waters and calm waves.
Even those with small children and beginners to swimming can play safely.
With a parking lot, showers, and restrooms on-site, it's perfect for family trips!
Access: 10 minutes by car from Amami Airport
↓Learn more about Cape Ayamaru
Cape Ayamaru - Amami-Oshima-. Ayamaru Cape, now one of the Kagoshima Romantic Roads, is located at the northern end of the island near Amami Airport, the gateway to the sky, and is known as a representative scenic spot where you can look down dynamically on the sea spread out before you. It is also a place where you can feel the openness of the tropics and enjoy the fascinating panorama all to yourself.
Ohama Seaside Park
Ohama Seaside Park is easily accessible from Amami City and features a wide sandy beach.
During the summer, the beach is open to the public, and children and adults alike can safely enjoy playing in the ocean.
It is also a great spot for camping and strolling.
Access: 50-70 minutes by car from Amami Airport
↓Learn more about ↓ Ohin Seaside Park
Ohama Seaside Park-Amami Oshima Ohama Seaside Park is located in Ohama, Oshuku, Naze, Amami City. Located about 15 to 20 minutes by car from Naze, the largest city on Amami Oshima Island, the park is visited by many locals as well as tourists, who can enjoy the beautiful sea and chalk white sandy beach of Amami. There are many subtropical plants in the park, including cycads, adans, banyan trees, and many other species.
A hole in the beach with high transparency and a spectacular view

Less touristy beaches may offer more natural and beautiful seascapes.
The clarity of the water is high where the reefs and coral reefs are spread out, making it suitable for snorkeling.
Amami Oshima Island is also dotted with hole-in-the-wall spots recommended for those who wish to avoid the crowds and enjoy the quiet ocean.
↓Click here to read the article.
Top Scenic Spots Carefully Selected by Our Amami-Based Staff! From Must-See Destinations to Hidden Gems!9 Spectacular Spots on Amami Oshima Island! Amami Oshima Island is an attractive sightseeing spot with beautiful nature, rich culture, and mild climate. The island is easily accessible, only about an hour by air from Kagoshima, and direct flights from Kansai and Kanto are increasing.
Kurasaki Coast
Located in the southern part of Amami Oshima, Kurasaki Beach is perfect for snorkeling, with few people and crystal-clear waters!
This is a great spot to observe coral reefs and tropical fish up close, and is recommended for those who want to enjoy the sea in peace and quiet.
Access: 25 minutes by car from Amami Airport
embankment
Tsuchimori Beach, easily accessible from Amami Airport, is a spectacular beach with clear, white sands.
The sunset is also beautiful, making it a perfect spot for taking pictures and relaxing and enjoying the ocean.
Access: 5-10 minutes by car from Amami Airport
↓Learn more about the Dosimori Coast
Tsuchimori Coast - Amami-Oshima Island Domori Beach, located in Domori, Kasari-cho, Amami City, Kagoshima Prefecture, is a beautiful beach near Amami Airport. Access is a 5-minute drive from the airport on Prefectural Road 601 in the direction of Cape Ayamaru, and follow the signs. As you drive down the beach from the parking lot, the contrast between the dark emerald green sea and air, the white sand beach, and the clouds is stunning.
Points to enjoy the sea in Amami Oshima sightseeing

In addition to swimming and snorkeling, visitors to Amami Oshima can enjoy a variety of marine activities.
In order to enjoy ocean fun safely while protecting the rich natural environment, there are severalKnow the key points.It is important to
Here are some tips for making the most of the ocean on Amami Oshima!
↓Click here to read the article.
18 recommended beaches in Amami Oshima! Spectacular view, hole-in-the-wall, sea turtle spots Let's go see the beautiful sea of Amami Oshima, called "Amami Blue"! There are many beautiful beaches on Amami Oshima Island, which is registered as a World Natural Heritage site. The wide sky, crystal clear sea, and white sandy beaches. All of them are collectively called "Amami Bu [...]" because of their beauty.Click here for the ranking of popular tours to Amami Oshima Island
Points to keep in mind when playing in the ocean on Amami Oshima Island

The sea of Amami Oshima is rich in nature,Changes in tides and weather conditionsattention should be paid to the following.
Check the information on swimmable areas and sea conditions, and enjoy playing in the ocean with safety in mind!
It is also important to be aware of the need to protect the natural environment, for example by not damaging coral reefs.
Marine activities you can experience in Amami Oshima

In addition to snorkeling and diving, Amami Oshima Island offers a variety of marine activities such as SUP and kayaking.
Activities enjoyed in the crystal clear waters will be a memorable part of your trip.
There are many tours for beginners, allowing them to experience the charm of the sea in an easygoing manner.
SUP plan for Amami Oshima is here↓↓.
★Fall Special SALE [Amami Oshima / Approx. 2 hours] Mangrove SUP Adventure in the Great Outdoors of a World Natural Heritage Site☆ Leisurely Enjoy the Primeval Forest on a SUP♪ Recommended for Families and Couples (No. 76)開始時間9:00-11:30 / 14:00-16:30所要時間Approximately 2 hours and 30 minutes10,300 yen →directional marker or indicator8,800suffix for names of swords, armour, musical instruments, etc.
★Special Autumn SALE [Amami Central South/Oshima Strait]Amazing coral reefs and transparency★Shirahama SUP & Snorkeling 1 Day Course《with island lunch box》(No.44).開始時間9:00-16:00所要時間Approx. 7 hours27,000 yen →directional marker or indicator25,500suffix for names of swords, armour, musical instruments, etc.
Amami Oshima Island / 2.5 hours] Enjoy with family, friends and couples☆Walking on the sea by SUP! Let's enjoy the extraordinary experience of paddling on the waves♪ 《Participation OK from 5 years old, photo data included》(No.191).開始時間(1) 9:00 - 11:30 / (2) 12:00 - 14:30 / (3) 15:00 - 17:30所要時間Approx. 2.5 hours7,700 yen↓Click here for Amami Oshima Kayak Plan
Trekking and mangrove canoeing in a small group in the Kinsaku Primeval Forest, a World Natural Heritage site (with a certified guide and pick-up service) (No.59)開始時間Negotiable所要時間Approx. 8 hours12,000 yen →directional marker or indicator11,000suffix for names of swords, armour, musical instruments, etc.
Amami Oshima Island/1 day】Snorkeling & mangrove canoeing with sea turtle encounter rate of 98% (with pickup and drop-off, shower and other facilities) (No.31)開始時間Negotiable所要時間Approx. 8 hours14,000 yen →directional marker or indicator13,000suffix for names of swords, armour, musical instruments, etc.
Special Autumn SALE 【Amami Oshima/Half Day】You can charter a private boat! Waterfall Walk & Mangrove Canoe Tour to be healed in mysterious space 《small group, free cancellation until 2 days before》(No.75).開始時間9:00-12:30 / 14:00-17:30所要時間Approx. 3 hours and 30 minutes10,300 yen →directional marker or indicator8,800suffix for names of swords, armour, musical instruments, etc.
Recommended plan to enjoy Amami Oshima sightseeing and the ocean

In addition to the ocean, Amami Oshima sightseeing also includes mangrove primeval forests and natural scenery.
Enjoy snorkeling and swimming during the day and watching the sunset on the beach in the evening!
Nature and culture merge.You can fully enjoy a trip unique to Amami Oshima.
↓Click here to read the article.
The Ultimate Guide to Traveling to Amami Oshima! How Many Days Do You Need? A Comprehensive Guide to the Best Times to Visit, Costs, Sample Itineraries, and Recommended PlansAmami Oshima Island, located right in the middle of Kagoshima and Okinawa, is a “healing paradise” where time passes slowly and you can get away from the daily routine. In recent years, the island has been registered as a World Natural Heritage site, attracting much more attention. The island is a paradise of relaxation and [...]...
Regarding the opening of the sea on Amami Oshima Island
Frequently Asked Questions (FAQ)
summary

The Amami Oshima Sea Opening is held in conjunction with the traditional event "Sangatsu Sanchi" on March 3 of the lunar calendar, and is a cultural event that marks the arrival of spring.
Swimming and snorkeling can be enjoyed long from early summer to autumn, and the clear waters, coral reefs, and abundant marine life are attractive.
When you visit Amami Oshima, be sure to enjoy the unique charms of the tropical seas while helping to protect the beautiful ocean and natural environment!
↓Click here to read the article.
I want to see sea turtles on Amami Oshima Island! Recommended snorkeling spots and the best season☆Introducing the time of spawning and spots for observationCan I see sea turtles on Amami Oshima Island? Amami Oshima Island is an island rich in nature surrounded by beautiful coral reefs and is known as a habitat for sea turtles. In particular, green turtles and loggerhead turtles inhabit the waters around the island, and there are chances to meet them throughout the year [...].
Summer is in full swing] A complete guide to weather, temperature, and attire for August on Amami Oshima Island. What is August like on Amami Oshima Island? For those who want to experience a quiet and relaxing tropical atmosphere that is a little different from that of mainland Okinawa, and for those who want to enjoy the magnificent nature, we recommend Amami Oshima Island in Kagoshima Prefecture, which was registered as a World Natural Heritage site in July 2021, and [...].
Before you travel, you need to know! A thorough explanation of the summer vacation situation on Amami Oshima! What is summer vacation in Amami Oshima? Let's go to Amami Oshima for your summer vacation this year! Summer is the best season for sightseeing, and many tourists visit Amami Oshima. In this issue, we will provide a thorough explanation of Amami Oshima during the summer vacation period. Let's spend the summer on Amami Oshima [...].













