If you have seen a photo of a diver hovering under a manta ray somewhere in Japan and wondered where it was taken, there is a good chance it was Ishigaki. This small island in the far south of Okinawa is the one place in Japan where watching a manta glide overhead is a normal part of a dive day, not a lucky accident.
We are a couple who lived on Miyakojima, the island next door, so Ishigaki was our “big island” — the flight-and-ferry hub for the whole Yaeyama group, and the place we went specifically for the mantas. Here is what we wish someone had told us before the first trip: when to go, what the famous sites are actually like, and the one beautiful spot where you are not allowed to get in the water.
Why divers fly all the way to Ishigaki
The draw is one animal: the reef manta ray. Off the Kabira-Ishizaki coast, on the island’s north-west side, are two sites almost every shop visits — Manta Scramble and Manta City Point. Both sit over shallow reef, roughly 10–15 metres deep, dotted with “cleaning stations” where mantas circle slowly while small fish tidy them up. Because it is shallow, you can often watch the same scene while snorkelling on the surface — which matters if not everyone in your group dives.
Nothing in the sea is guaranteed. We have surfaced from a manta site having seen a lot of very nice coral and no manta at all. But in the right season the odds here are as good as anywhere in Japan, and local operators quote sighting rates close to 100% at the summer-to-autumn peak.
The main sites at a glance
| Site / area | Depth | What you see | Good for |
|---|---|---|---|
| Manta Scramble | approx. 10–15 m | Mantas at cleaning stations, coral | Beginners and snorkellers, in season |
| Manta City Point | approx. 10–15 m | Mantas, sometimes several at once | Same area; the shop picks by the day’s conditions |
| Outer Yaeyama reefs | varies | Healthy coral, reef fish, turtles | Fun dives when mantas aren’t the focus |
When to go: manta season and water temperature
You can dive Ishigaki all year, but two things decide your trip: manta season and typhoons.
Mantas. The reliable window runs from around May to October, and the encounter rate is highest from summer into autumn — roughly July to October. Winter dives happen too, but a sighting is less of a sure thing.
Typhoons. Late summer and early autumn are also typhoon season in Okinawa. A passing storm can cancel boats for a day or two, so build a little slack into your dates. Don’t schedule your only dive day as the day before you fly home — we’ve seen people lose their one shot that way.
Water temperature. The sea around Ishigaki stays diveable in every season.
| Area | Winter (Jan–Mar) | Summer (Jul–Sep) |
|---|---|---|
| Sea around Ishigaki | approx. 21–22°C | approx. 28–29°C |
Source: sea-surface temperatures around Okinawa from the Japan Meteorological Agency (as of September 2026). Most shops dive all winter in a thicker wetsuit, hood and gloves, all rentable.
Kabira Bay: gorgeous, and off-limits for swimming
Every guide to Ishigaki shows Kabira Bay, and it earns the postcard: milky-emerald water, green islets, white sand. Here is the part that catches visitors out — you cannot swim, snorkel or dive in Kabira Bay. It is one of Japan’s black-pearl cultivation sites, and it has strong currents and boat traffic, so entering the water is not permitted.
What you do instead is take a glass-bottom boat — about 30 minutes for ¥1,300 (roughly US$8, as of September 2026), running through the day. Through the floor you see the coral, tropical fish and, if you’re lucky, a turtle. It is a lovely half-hour, and completely separate from the manta diving out at Kabira-Ishizaki up the coast. Don’t confuse the two: the scenic bay is for looking, the manta sites are for diving.
Source: Japan National Tourism Organization
Getting there and choosing a shop
Ishigaki has its own airport, New Ishigaki Airport, with direct flights from Tokyo (Haneda and Narita) and short hops from Naha and Miyakojima. From the airport it is a bus or taxi ride to the town around Ishigaki Port, where most dive shops, hotels and the ferry terminal for the other Yaeyama islands are clustered.
A few things worth knowing when you book a dive:
- Say if it is your first boat dive. The manta sites are usually calm, but conditions change day to day and some spots can carry current. A good shop matches the site and the group to your level — tell them honestly how many dives you have logged.
- Snorkelling counts. Because the mantas are shallow, many operators run snorkel-only manta trips. If your partner doesn’t dive, they can still be right there on the surface with you.
- No licence yet? Try-dives — a guided “discovery” dive with no certification — are widely available. If you’d rather come home certified, see our guide to getting a diving licence in Japan.
Most people base themselves near the port and town. You can compare rates at Ishigaki hotels on Trip.com.
Practical notes for first-time visitors to Japan
- Carry cash. Okinawa’s islands run more on cash than Tokyo does. Dive shops and smaller restaurants may not take cards, so bring yen; 7-Eleven and Japan Post ATMs accept most foreign cards.
- No tipping. You never tip a dive guide, a driver or a restaurant in Japan. A genuine arigatou is the custom, and it’s plenty.
- IC cards don’t help much out here. Suica and PASMO are wonderful in Tokyo, but Ishigaki’s local buses and taxis mostly want cash — don’t count on tapping.
- Reserve dives ahead in summer. Peak manta season books up, especially around Japanese holidays like Obon in mid-August. Email the shop or use its site before you arrive rather than walking in.
Still deciding which Okinawan sea to pick? We compare the islands in our guide to diving in Okinawa, and if you’d rather spend the day on the sand, see our Okinawa best beaches round-up.
FAQ
Am I guaranteed to see a manta in Ishigaki?
No — it’s wildlife, so nobody can promise it. But from around July to October the sighting rate at the Kabira-Ishizaki manta sites is very high, and shops report mantas on the large majority of trips. Give yourself two or three dive days rather than one to stack the odds.
Can a complete beginner see the mantas?
Yes. The manta sites are shallow, so you can join a snorkel trip with zero experience, or do a guided try-dive without a licence. If you’re already certified, they’re an easy boat dive for most levels — just tell the shop how many dives you’ve done.
Is Ishigaki or Miyakojima better for diving?
Go to Ishigaki if seeing a manta ray is the main goal. Choose Miyakojima for dramatic underwater terrain — caves, arches and that deep coral-blue — though mantas aren’t its thing. Honestly, if you have the time, the two make a great pair on one Okinawa trip.
Before you book
Ishigaki is a long way south of Tokyo, and it is worth the flight for one reason above all: the chance to hang weightless while a manta the width of a car turns slowly overhead. Aim for summer or early autumn, leave a spare day for the weather, carry cash, and let the shop steer you to the right site on the day. Then breathe slow, and look up.
