The Yanbaru Forest — A UNESCO-Recognized Subtropical Wilderness
The Yanbaru forest blanketing northern Okinawa was inscribed as a UNESCO World Natural Heritage Site on July 26, 2021. Its official designation, "Amami-Oshima Island, Tokunoshima Island, Northern Part of Okinawa Island and Iriomote Island," makes it Japan's fifth natural heritage site. On September 15, 2016, Yanbaru National Park (approximately 17,300 hectares: 13,622 hectares of land plus 3,670 hectares of marine area) was established to protect the subtropical evergreen broadleaf forests.
The star of this forest is the Yanbaru kuina (Okinawa rail). This flightless bird, approximately 30 centimeters long with a 50-centimeter wingspan, was not formally reported to the scientific community until 1981 by Yoshimaro Yamashina. Its habitat spans just 260 square kilometers of the Yanbaru region. The Noguchi woodpecker (Okinawa woodpecker) also lives exclusively in this forest, and in 2024 its conservation status was improved from "critically endangered" to "endangered" thanks to population stabilization.
Cape Manzamo — The Cliff That Could Seat 10,000
In the 18th century, Ryukyuan King Sho Kei gazed upon the vast grassland atop this cape and exclaimed that it could "seat 10,000 people." This became its name: man (10,000) plus za (to sit) plus mo (field). Centuries of ocean waves carved the coral limestone cliff into a formation approximately 20 meters high that resembles an elephant's trunk, creating one of Okinawa's most photographed landscapes.
A new visitor facility opened at Cape Manzamo in 2020, featuring shops, a restaurant, and a second-floor observation deck. The 100-yen environmental conservation fee allows free exploration, and parking is free for the first hour (capacity approximately 300 vehicles). Visiting at sunset rewards you with views of the East China Sea turning red beyond the elephant trunk rock.
The Blue Cave — An Emerald Cathedral Made of Light
The Blue Cave at Cape Maeda in Onna-son is a partially submerged sea cave approximately 35 meters deep with a maximum water depth of about 6 meters. The scientific explanation for its blue glow is straightforward: sunlight enters through the cave's entrance and penetrates below the water surface, where the white calcareous sand (coral sand) on the seabed reflects the light upward. This reflected light illuminates the water surface in brilliant emerald.
The blue light is most vivid from dawn to noon, with subtle shifts in hue throughout the day. Both snorkeling and scuba diving are available, with May through October being the prime season, though the cave is accessible year-round. It is about one hour by car from Naha, or approximately 15 minutes from Ishikawa Interchange via Route 58. Parking at Cape Maeda costs approximately 100 yen per hour.
Six Best Beaches on Okinawa's Main Island
Emerald Beach (Motobu, within Ocean Expo Park) is a Y-shaped man-made beach divided into three zones: Asobi no Hama (Beach of Play), Yasuragi no Hama (Beach of Rest), and Nagami no Hama (Beach of Viewing). It holds a Grade A water quality rating from Japan's Ministry of the Environment and is listed among Japan's 100 Best Bathing Beaches. Open April 1 through October 31, it has jellyfish defense nets and lifeguards on duty. Both admission and parking are free.
Naminoue Beach (Naha) is the city's only swimming beach, with Naminoue Shrine perched on the cliff above. Nirai Beach (Yomitan) stretches approximately 400 meters as a natural beach with some of the clearest water on the main island. Manza Beach (Onna-son) offers 300 meters of white sand in front of the ANA InterContinental, while Okuma Beach (Kunigami) presents a one-kilometer stretch of natural white sand in the north. Sunset Beach (Chatan) is a man-made beach beside American Village with spectacular sunsets. Most beaches are open from April through October, with box jellyfish advisory running from June through October.
Mangrove Kayaking — Subtropical Hidden Waterways
The mangrove forest at Gesashi Bay in Higashi Village covers approximately 10 hectares, making it the largest on Okinawa's main island. Stretching about one kilometer upstream along the Gesashi River and approximately 200 meters wide, it was designated a Japanese National Natural Monument on May 15, 1972, the date of Okinawa's reversion to Japan. Three mangrove species grow here: Ohirugi (Bruguiera gymnorrhiza), Mehirugi (Kandelia obovata), and Yaeyama Hirugi.
Higashi Village Fureai Hirugi Park offers a free boardwalk and observation tower above the mangroves. Kayak tours range from one hour (suitable for families) to five hours (paddling out to the Pacific Ocean), allowing close observation of mangrove ecology including crabs, shellfish, and gobies. Parking is free. The address is 54-1 Gesashi, Higashi Village.
Nature Events the Seasons Create
Okinawa's cherry blossoms are the earliest in Japan, blooming from mid-January to early February. The variety is kanhizakura (Taiwan cherry), which differs from mainland Japan's pale Somei Yoshino with deep crimson bell-shaped flowers that hang downward. Nakijin Castle hosts nighttime illuminations against UNESCO World Heritage castle walls (January 31 to February 1, 2026), while Mount Yaedake (453 meters) features over 7,000 cherry trees blooming along mountain roads (January 17 to February 1, 2026). Uniquely, Okinawa's cherry blossoms progress from north to south.
Around the full moon in May and June, coral spawning occurs. The spectacle of hundreds of coral colonies simultaneously releasing gametes peaks approximately two to four hours after sunset (around 10 PM). The Churaumi Aquarium has observed coral spawning in its tanks for 19 consecutive years. From January through March (peaking in February and March), humpback whales can be observed around the Kerama Islands, particularly in waters near Zamami and Tokashiki, with an encounter rate of approximately 98 percent. The Zamami Village Whale Watching Association operates a system where scouts at observation decks spot whales and radio their locations to tour boats.
Becoming a Traveler Who Protects Nature
The Onna Village Fisheries Cooperative began cultivating coral in 1998, growing miniature coral colonies on metal supports. In 2003, they successfully returned cultivated coral to the sea, and to date have transplanted 104,687 coral colonies across 2.74 hectares. In 2023, the Okinawa Institute of Science and Technology (OIST) launched the world's first coral conservation project utilizing genome research. Reef Check Okinawa operates EcoDiver certification courses and contributes coral reef health monitoring data to a global network.
Travelers can contribute too. At beaches, swim only within designated areas (inside jellyfish nets) and never stand on or touch coral. Use reef-safe sunscreen free of oxybenzone, which harms coral. Join beach cleanup activities like those organized by Churakids. In Yanbaru, stay on designated trails and never feed wildlife. Hiji Falls (admission 500 yen for adults, 300 yen for children) and Daisekirinzan (approximately 1,200 to 2,500 yen) have set admission hours, so check in advance.
