Southern Okinawa, Nanjo City, directly across from Okinawa World (Gyokusendo Cave). Walk down the stairs from the parking lot and a massive cave entrance appears — with a café inside. The "Valley of Gangala" is a subtropical valley born when a limestone cave system collapsed approximately 300,000 years ago. The area covers roughly one Tokyo Dome (~48,000 sqm), with a walking distance of about 1 kilometer. Yet within this short trail lies 20,000 years of human history, Ryukyu spirituality, and 300,000 years of geology, all compressed into one extraordinary experience.
A Valley Born from a 300,000-Year-Old Collapsed Cave
The Valley of Gangala's origins date back hundreds of thousands of years. A massive underground cave system carved from Ryukyu limestone collapsed naturally, forming the valley we see today. Subtropical jungle grew over the collapsed cave, creating a lush green canopy, while the remaining cave structures preserve their stalactites and stalagmites intact.
Directly across the road, Gyokusendo Cave stretches 5 kilometers — giving you a glimpse of what Gangala might have looked like had it not collapsed. Stalactites grow at approximately 1 centimeter every 70 years, placing this valley's time scale far beyond human comprehension.
Since opening to the public in 2008, the valley is accessible only via pre-booked guided tours to protect its fragile natural environment and archaeological sites. Approximately 80,000 visitors per year make this one of Okinawa's hidden gems.
Cave Cafe — Adventure Starts Inside a Cavern
The tour begins at the Cave Cafe (CAVE CAFE), set inside a natural stalactite cave. Archaeologically known as Sakitari Cave, this is also where the world's oldest fishhook was discovered — making your coffee spot a significant archaeological site.
Sipping coffee beneath natural stalactites covering the ceiling and walls is an experience available nowhere else in Okinawa. The cave acts as natural air conditioning — cool even in midsummer — while water droplets falling from stalactites create nature's own background music.
The signature drink is "35 Coffee" (Sango Coffee). Beans are roasted using weathered coral heated above 200°C, producing a smooth flavor with minimal bitterness. "35" is Japanese wordplay: 3=san, 5=go, making "sango" (珊瑚, meaning coral).
The Cave Cafe is exclusively for tour participants, accessible up to 1 hour before tour departure. All-inclusive drinks for 500 yen.
Ufushichu Gajumaru — The 20-Meter "Wise Man of the Forest"
The undisputed highlight is the Ufushichu Gajumaru. Standing approximately 20 meters tall with an estimated age of 150 years, this enormous banyan tree grows from the cliff face of the collapsed cave, draping countless aerial roots downward.
In Okinawan, "Ufushichu" (大主) means "great master." The symbol of the Valley of Gangala and dubbed the "Wise Man of the Forest," standing before this tree makes you feel how small humans are against the timescale of nature.
Okinawan tradition holds that Kijimuna — tree spirits with red hair — live in banyan trees. These sprites bring good fortune to kind people and play tricks on the wicked. Guides take group photos before the Ufushichu Gajumaru, making it the trip's ultimate souvenir.
The tour also features the "Walking Gajumaru" — a banyan whose aerial roots gradually shift its position, making the tree appear to "walk" over decades.
Inagu & Ikiga Caves — Living Ryukyu Prayer Sites
Within the valley lie sacred sites that have served as places of worship for centuries since the Ryukyu Kingdom era. Called Taninushi Utaki (Shrine of the Seed Child), the complex consists of two caves.
Inagu Cave is the "women's cave." "Inagu" means woman in Okinawan, and the stalactites inside resemble female breasts, making it a prayer site for good marriage and safe childbirth.
Ikiga Cave is the "men's cave." It contains phallic stalactites and serves as a prayer site for the birth of life and healthy growth. During the Ryukyu era, people traveled from as far as Kumejima and Miyako Island to pray here.
Noro (Ryukyuan priestesses) and Yuta (Okinawan folk shamans) still visit today, and many return for "thanksgiving visits" after their prayers are answered. This is living Ryukyu spirituality — where nature itself is the temple, without any built structures.
Minatogawa Man — People Who Lived Here 20,000 Years Ago
In 1967, approximately 1.5km from the Valley of Gangala, amateur archaeologist Ooyama Seiho discovered Paleolithic human fossils. Named Minatogawa Man, the fossils consisted of skeletons of one adult male and three adult females, radiocarbon dated to approximately 20,000–22,000 years ago.
Minatogawa Man was long considered the oldest complete human skeleton discovered in Japan. The male stood approximately 150–155cm tall, with a slender upper body and well-developed lower body — the build of a hunter-gatherer.
The valley's caves, river, and rich natural resources would have been ideal for Paleolithic inhabitants. From the Tree Terrace on the tour, you can survey the Minatogawa Man discovery site.
World's Oldest Fishhook & Gyokusendo — Archaeological Treasure Trove
Excavations beginning in 2009 at Sakitari Cave — where the Cave Cafe sits — yielded remarkable results. Published in the journal PNAS in 2016, a fishhook dating to approximately 23,000 years ago was confirmed as the world's oldest. Carved from shell, this tiny hook demonstrates the sophisticated craftsmanship of Paleolithic peoples.
Also discovered: approximately 30,000-year-old infant remains, 7,000-year-old nail-patterned pottery (southern Okinawa's oldest), and evidence of fire-making from 4,000 years ago. At the tour's final stop, Bugeido Cave, a stone coffin containing human remains dated to approximately 3,000 years ago was found just below ground level.
Across the road, Gyokusendo Cave stretches 5km total (890m open to public), sitting on the same limestone formation as Gangala Valley. It's inside Okinawa World alongside Eisa dance shows, Ryukyu glass workshops, and a snake park — making it a perfect pairing with the Gangala tour.
Tour Booking & Southern Okinawa Day Trip Guide
Tour Details
- Departure times: 10:00 / 12:00 / 14:00 / 16:00 (4 tours daily)
- Duration: Approximately 1 hour 20 minutes (allow 1.5 hours total)
- Distance: Approximately 1km
- Pricing: Adults 2,500 yen, Students (middle school+) 1,500 yen, Elementary and under free (with guardian)
- Booking: Reservation required by 5 PM the day before. Phone 098-948-4192 or official website
- Guide language: Japanese (free audio guides in English, Chinese, Korean available)
- Included: Guide, sanpin (jasmine) tea, insect repellent gel, insurance
What to Bring & Notes
- Shoes: Comfortable sneakers (no heels; sandals OK but sneakers recommended)
- Rain: Tours run in rain. Simple ponchos available for 100 yen
- Restrooms: None on the tour route. Use facilities before departure
- Wheelchair/stroller: Not accessible (stairs involved)
- Pets: Not permitted
Recommended Southern Okinawa Day Trip
- 9:30 AM — Arrive at Gangala Valley, 35 Coffee at Cave Cafe
- 10:00 AM — Gangala Valley guided tour (~1 hr 20 min)
- 11:30 AM — Okinawa World: Gyokusendo Cave + Eisa show (~2 hours)
- 2:00 PM — Nirai Kanai Bridge drive → Sefa Utaki (~1 hour)
- 3:30 PM — Cafe break or stroll at Mibaru Beach
- 5:00 PM — Return to Naha (~30–40 min)
Access
- Rental car: ~30–40 minutes from Naha Airport. Free parking for ~100 vehicles
- Bus: Routes 83 or 54 from Naha Bus Terminal → Gyokusendo-mae stop, 2-min walk. ~1–1.5 hours total
