Last Updated on 2025 年 9 月 1 日 by 総合編集組

Discovering Yonaguni: A Comprehensive Guide to Japan’s Westernmost Island

Yonaguni Island, Japan’s westernmost inhabited island, is a hidden gem in the Okinawa Prefecture’s Yaeyama Islands, located just 108 kilometers from Taiwan. Spanning only 28.88 square kilometers with a population of approximately 1,655 (as of May 2025), this remote island captivates travelers with its unique blend of natural wonders, cultural heritage, and enigmatic underwater ruins.

This guide summarizes the key highlights of a detailed travel article, covering transportation, must-visit attractions, local cuisine, accommodations, cultural experiences, and practical tips, making it an ideal resource for international visitors and adventure seekers.

Overview of Yonaguni Island

Yonaguni, or “Dunan” in the local Ryukyuan language, is a subtropical island with diverse landscapes, including rolling hills, lush grasslands, and pristine coastlines. Its strategic location, closer to Taiwan than mainland Okinawa (509 km) or Ishigaki (117 km), makes it a unique cultural bridge between Japan and Taiwan. The island is renowned for:

• Geographical Significance: As Japan’s westernmost point, it offers stunning views of Taiwan’s mountains on clear days.
• Underwater Mystery: The Yonaguni Monument, a submerged rock formation, sparks debates about whether it’s a natural geological marvel or a remnant of an ancient civilization.
• Unique Ecosystem: Home to the rare Yonaguni horse (only about 100 remain) and seasonal hammerhead shark gatherings.
• Ryukyuan Culture: Rich traditions like Yonaguni weaving and the “kaida-di” pictographs preserve the island’s heritage.

Travelers describe Yonaguni as a place where time slows down, offering a serene escape from urban life.

Getting to Yonaguni: Transportation Options

Reaching Yonaguni requires planning due to its remote location, but the journey is part of the adventure.

• By Air: The fastest option is flying with Ryukyu Air Commuter (RAC) from Naha Airport (90 minutes) or New Ishigaki Airport (30 minutes). One-way tickets range from ¥8,000 to ¥15,000, and the aerial views of the Yaeyama Islands’ turquoise waters are a highlight. Flights may occasionally be delayed due to the island’s proximity to Taiwan’s air defense zone.
• By Ferry: For budget travelers, Fukuyama Shipping operates the “Ferry Yonakuni” from Ishigaki Port (4.5 hours, ¥3,500–¥5,000 one-way), running 2–3 times weekly (typically Tuesdays and Fridays). The route is known for rough seas, earning it the nickname “Japan’s rockiest ferry ride.”
• Island Mobility: With a 27-km circumference, Yonaguni is ideal for exploration by rented car (¥3,000–¥6,000/day) or scooter (¥2,000–¥4,000/day). Bicycles are great for slow-paced travel, though some hilly sections require stamina. Limited tourist buses and taxis are available but less flexible.

Top Attractions: 10 Unmissable Experiences

Yonaguni’s attractions blend natural beauty, cultural significance, and adventure:

1. Cape Irizaki: The westernmost point of Japan, marked by a monument, offers breathtaking sunsets and potential views of Taiwan. Visitors can collect a “Westernmost Point Certificate” as a keepsake.
2. Yonaguni Monument: Discovered in 1986, this underwater structure features stepped stones and possible man-made channels, fueling speculation about ancient civilizations. Diving tours (¥10,000–¥15,000) are popular from November to May, often with hammerhead shark sightings.
3. Agarizaki (East Cape): A scenic cliffside with grazing Yonaguni horses against the backdrop of the Pacific Ocean. Horseback riding costs ¥3,000–¥5,000.
4. Tachigami Rock: A sacred rock formation revered as a guardian deity, best viewed from the South Pasture Line lookout.
5. Dr. Coto’s Clinic: A preserved filming location from the beloved Japanese drama Dr. Coto’s Clinic, offering a nostalgic experience for fans.
6. Kubura Fishing Port & Nanta Beach: Ideal for fishing and snorkeling, with clear waters teeming with tropical fish.
7. Yonaguni Weaving: Hands-on workshops (¥2,000–¥4,000) allow visitors to create traditional textiles, reflecting Ryukyuan craftsmanship.
8. Battleship & Human Face Rocks: Natural rock formations resembling a ship and a face, perfect for photography.
9. Hammerhead Shark Diving: Winter dives offer a chance to witness the “Hammerhead Tornado,” a mesmerizing spectacle of shark schools.
10. Stargazing: Yonaguni’s minimal light pollution makes it a prime spot for starry nights, especially at Agarizaki or campsites.

Local Cuisine: A Taste of Yonaguni

The island’s cuisine highlights fresh seafood and local ingredients, infused with Ryukyuan flavors:

• Marlin Dishes: Marlin, a local staple, is served as sashimi, grilled, or in burgers at places like Uminchu Shokudo(¥1,000–¥2,000).
• Longevity Grass (Chomeiso): A nutrient-rich vegetable used in juices, noodles, or tempura, found at Yamamoto Restaurant (¥800–¥1,500).
• Hanazake: A potent 60% alcohol spirit unique to Yonaguni, produced by three century-old distilleries. Tastings at Yonaguni Shuzo cost ¥500–¥1,000.
• Okinawan Classics: Dishes like bitter melon stir-fry and Okinawa soba reflect the island’s culinary heritage.

Accommodations: Where to Stay

Yonaguni’s lodging options are modest but cozy, emphasizing local hospitality:

• Hotel Munbu Stay Nanta Hama: A 3-star hotel near Nanta Beach with parking and shuttle services (¥8,000–¥12,000/night).
• Yonaguni no Ie Guesthouse: A family-style minshuku in Sonai with shared kitchens and warm hosts (¥5,000–¥8,000/night).
• Campsites & Hostels: Budget-friendly options (¥2,000–¥4,000/night) offer stargazing opportunities.

Early booking (3–6 months in advance) is advised, especially during peak seasons (March–May, September–November).

Cultural and Adventure Activities

• Diving & Snorkeling: Explore the Yonaguni Monument or snorkel at Nanta Beach (¥5,000–¥20,000).
• Cycling: A 27-km bike loop offers a leisurely way to see the island’s highlights.
• Cultural Workshops: Learn Yonaguni weaving or Ryukyuan music for a deeper cultural connection.

Practical Travel Tips

• Best Time to Visit: November to May for diving (hammerhead season); March to May or September to November for milder weather and fewer crowds. June to August is typhoon season.
• Cash is King: Many shops don’t accept cards; bring ¥20,000–¥50,000/day in yen.
• Language: Japanese and Ryukyuan are dominant; English is limited. Carry a translation app.
• Connectivity: Some areas pick up Taiwan’s telecom signals, but renting a Japanese Wi-Fi router is recommended.
• Respect Nature: Avoid touching wildlife or marine life and keep the island pristine.
• Geopolitical Note: Recent military developments may affect the island’s tranquil vibe, so stay informed.

Historical and Cultural Context

Yonaguni’s history is rich with Ryukyuan heritage, from its incorporation into the Ryukyu Kingdom in 1510 to its cultural ties with Taiwan. Legends like the “Long-Eared People” from Taiwan highlight early interactions, while the Yonaguni Monument adds a layer of prehistoric intrigue. The island’s weaving traditions and rare horses embody its living culture.

Why Visit Yonaguni?

Yonaguni offers a rare blend of adventure, history, and tranquility. Whether diving into the ocean’s mysteries, riding horses along cliffs, or savoring local spirits, the island delivers unforgettable experiences. Its remote charm makes it a haven for those seeking to escape the ordinary and connect with nature and culture.

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