Now in season! Best of the ocean in April, May, and June

南里徹·May 16, 2026

Diving Season is Here! Ishigaki Island is Sparkling!

From April, there are many summer days with temperatures approaching 30 degrees Celsius,

marking the arrival of the hot and exciting diving season!

There's a lot to see!

The cuttlefish, mandarin fish, and coral spawning are must-sees!

And there will be more opportunities to encounter Ishigaki Island's iconic manta rays.

The sea of Ishigaki Island, gleaming brightly under the strong sunlight, awaits you!

Enriched Air Nitrox Available!

Now is the time to enjoy safer diving with Enriched Air Nitrox!

Enriched Air Nitrox is air with a lower percentage of nitrogen (and a higher percentage of oxygen), which reduces the risk of decompression sickness and lessens post-dive fatigue. It is the most-talked-about new diving style today!

You can use it for an additional ¥1,100 (per tank) on top of the regular diving fee!

*Only those with an Enriched Air Specialty certification can use it.

Of course, you can obtain your Enriched Air Specialty certification at our shop, so please take advantage of it.

April Recommendation: "Cuttlefish Spawning & Courtship"

A passionate drama unfolding right before your eyes!

Cuttlefish are large cuttlefish that can grow over 50cm in length.

Every year around this time in Ishigaki Island, many cuttlefish gather for breeding!

"Intense battles between males" fighting for females,

"Romantic courtship" that touches the heart,

and the birth of new life, "spawning."

There's a drama unfolding there, and it's sure to captivate us!

May/June Recommendation: "Mystical Coral Spawning"

Let's share this miraculous moment!

A miraculous moment that every diver wants to witness. A mystical world that appears only for a few nights around the full moon.

The spectacle presented by Ishigaki Island's precious corals is truly a "sparkling night show."

Although Ishigaki Island's corals suffered catastrophic damage due to high water temperatures in 2022,

they are not giving up and are gradually regenerating from scratch!

The sight of them desperately nurturing life towards recovery is sure to be moving ☆

S2CLUB Ishigaki Island Coral Spawning Prediction

★May 28 to June 3, 2026★

Spawning is expected to occur for 1-2 days within this period.

Since the predicted period is long, please contact our staff for details!

Coral spawning is a "miraculous moment" that can only be witnessed when all various conditions align.

While we recommend aiming for a longer period, it's difficult to go every single day.

Please plan your schedule with a certain amount of reliance on luck. Please understand that nature is unpredictable ♪

But still,

It's certain that you won't see it if you don't aim for it!

Come join us and become "witnesses of the mystery"!!

By the way, excluding the years when we postponed due to the pandemic,

we have been able to witness this mystical moment every year since we opened

Sample Schedule

6:30 PM Departure

Once preparations are complete, we set off for the sea before sunset! We board the boat from the harbor.

7:00 PM - 8:30 PM Wait on board

Upon reaching the point, we wait on board until the coral spawning time.

Spend some time gazing at the starry sky or enjoying a delicious coffee.

8:30 PM - 9:00 PM Entry

Once the staff confirms spawning, let's go!

If no signs of spawning are observed, we will return to port.

Approx. 10:30 PM Return to port

After returning to port, we will transfer you to your hotel.

Coral Spawning Night Dive Fee

Coral Spawning Night Boat Dive: ¥13,200 (tax included)

Price includes: 1 night boat dive, hotel transfers

*If no signs of spawning are observed after departure, we will return to port.

In that case, a boarding fee of ¥3,850 (tax included) will be charged.

Please acknowledge this in advance.

*We do not accept bookings for night dives only.

This is only available to guests who have utilized our daytime diving services.

June Recommendation: "Swarming & Coral Areas!"

Once the rainy season ends, it's full-on summer!

The sparkling, brilliant blue sea of Ishigaki!

In June, as summer approaches, the sunlight becomes stronger, and the colorful tropical fish become even more vibrant!

The schools of butterflyfish and anthias are also a spectacular sight.

The coral areas in northern Ishigaki Island are also recommended! Let's enjoy the bright underwater scenery!!

The summer sun makes the fish and corals even more vibrant!
The brightness also makes it easier to capture colors in photos, allowing you to aim for a stunning shot♪

The water temperature is also rising to around 27 degrees Celsius, and Ishigaki Island is switching to summer mode.

Marine conditions are stable, making for perfect diving weather.

And it's almost time for manta ray season!

Come and enjoy an early summer!

We are waiting for you!!