Gyokusendo Cave | Hot, Humid, and Too Beautiful to Rush Through

If you're visiting Okinawa in winter, remember one thing before entering Gyokusendo Cave: take off your coat.

I didn't. So I spent nearly an hour walking through the cave in a thick jacket, sweating, uncomfortably hot and humid. But every time I wanted to speed up and get out, something would stop me — a cluster of stalactites, a glowing underground pool. I finished the whole route feeling conflicted the entire way.

Coming Straight from Naha Airport

Gyokusendo is in Nanjo City, in southern Okinawa — about 30 to 40 minutes from Naha Airport by car. That's one of its biggest advantages.

Most of Okinawa's attractions are in the central and northern parts of the island. The south is relatively quiet. One approach: head south first from the airport, tick off Gyokusendo early, then work your way north. No backtracking, and no second-guessing whether the detour is worth it — just go.

You'll almost certainly need a car. Taxis work, but the fare from Naha adds up quickly. There's no convenient direct bus.

What It Feels Like Inside

Gyokusendo is one of Japan's longest limestone caves. The open section is about 890 meters — plan for 40 minutes to an hour.

The temperature inside stays around 21°C year-round, but the humidity is high. In summer, it feels refreshingly cool. In winter with a coat on, it's the opposite — stuffy, sticky, and warm in a bad way. If you're visiting in colder months, leave the jacket at the entrance. That's genuine advice, not a disclaimer.

The stalactites are the main event. Thousands of them hang from the ceiling — some forming curtain-like sheets of stone, others rising up from the floor in strange shapes. With blue and orange lighting throughout, it's hard to argue it's not beautiful.

Underground Pools

Several underground pools run through the cave. The most famous is called Ryuno Izumi (Dragon's Spring). The water is a deep blue-green — clear enough and deep enough that it looks artificially lit, but that's its actual color.

Looking down into it, there's a particular kind of stillness. Not exactly calm — more like the awareness that this thing has been here for a very long time, and you're just passing through.

The Story of This Place

Gyokusendo Cave lies beneath Maekawa, Tamagusuku, in Nanjo City, Okinawa — about a 30-to-45-minute drive from Naha Airport. Because water has always flowed from its mouth, locals knew the cave was there for centuries; but the full extent of this underground labyrinth was only mapped surprisingly recently — not until 1967, when an academic exploration team from Ehime University surveyed it and revealed its true shape for the first time. On April 28, 1972, Gyokusendo opened to the public as a show cave, and in September 1987 it was fitted with what is said to be the world's first in-cave escalator. And it is no small place: the cave system along the Yuhi River runs more than 5,000 meters and is made up of over 30 caverns. Gyokusendo itself took roughly 300,000 years to form, and is said to hold more than a million stalactites, making it one of the largest limestone caves in Japan — yet the walkable tourist route covers only about 800 to 890 meters of it. Right next door sits an even older story: the neighboring \"Valley of Gangala\" is a gorge formed when a limestone cave collapsed, and it was very likely a living ground for the \"Minatogawa people\" some 20,000 years ago — the nearby Sakitari Cave site even yielded a shell fishhook dated to about 23,000 years ago, considered among the oldest in the world.

As for legends, honesty first: Gyokusendo \"the cave itself\" carries no particular folktale of its own. But the limestone sanctuary it sits in is wrapped in two genuine, still-living beliefs. It is said that in the adjacent Valley of Gangala stand two sacred groves (utaki) worshipped by residents since the era of the Ryukyu Kingdom — \"Ikiga-do (the male cave)\" and \"Inagu-do (the female cave)\"; legend holds that their stalactites grew into forms symbolizing the sexes, the male cave presiding over children and the birth and growth of new life, and the female cave watching over good marriages and safe childbirth — and people are said to have crossed the sea from outer islands like Kume and Miyako to pray there. The second legend is grander still: it is said that the Tamagusuku area around Gyokusendo is the very heart of the myth of Amamikiyo, the goddess who created the Ryukyu islands. As the story goes, she came across the water from the paradise beyond the sea, Nirai Kanai, set her first footstep on this land, and dwelt beside a spring here — and even Tamagusuku Castle is said to have been built by her; to this day the site remains a stop on the \"Agari-umaai\" pilgrimage. (To be honest about it: neither legend belongs to the inside of Gyokusendo itself, but to the same limestone sanctuary that surrounds it.) Standing inside the cave, watching stalactites that took 300,000 years to grow drop by drop, and then remembering that the land just outside has been worshipped for centuries and lived in for 20,000 years, you suddenly feel that the Okinawa beneath your feet is far deeper — and far older — than you ever imagined.

Before You Go

・Admission (Gyokusendo is the park entrance; no cave-only ticket): ¥2,000 adults, ¥1,000 children (ages 4–14)
・The same admission covers the Snake Museum and other Okinawa World facilities; Gyokusendo is entered through the park
・Hours: 9:00–17:30 (last entry at 17:00)
・About 30 minutes by car from Naha Airport; free parking on site
・Tickets available in advance on Klook or KKday — skip the queue at the gate

If you're visiting Okinawa, this one deserves a slot in your itinerary. Not because it's on every must-see list — but because at some point while you're walking through it, you'll quietly register that the earth spent hundreds of thousands of years making this, and you just walked through it in an hour.

Even in a sweaty coat, it's worth it.