Forget everything you think you know about island getaways near Tokyo. Kozushima isn't just another beach stop. It's a living, breathing volcanic island where emerald green waters meet ancient lava flows, where you're more likely to hear birdsong than traffic, and where the pace of life resets your internal clock. Part of the Izu Islands chain administered by Tokyo, Kozushima offers a raw, unfiltered Japanese island experience that feels worlds away from the mainland, yet is surprisingly accessible. I've lost count of my visits to the Izu Islands, and Kozushima remains a standout for its unique geography and sheer tranquility.
Your Kozushima Island Navigation
Why Kozushima Stands Out
Most guides will tell you about the beaches. They're right—the sand is fine and white, a result of eroded coral, not volcanic rock. But Kozushima's soul is its volcano, Tenjosan. The entire southern half of the island is a dramatic landscape of obsidian-like black lava formations, stark against the turquoise sea. This creates a hiking experience you won't find on other Izu Islands like Oshima or Niijima. The contrast is breathtaking: one moment you're on a tropical-looking beach, the next you're walking on terrain that feels lunar. It's this duality that makes planning a Kozushima itinerary so rewarding.
How to Get to Kozushima Island: Ferries & Flights
This is the make-or-break part of your planning. There's no bullet train here. Your choice depends entirely on your budget, tolerance for seasickness, and schedule.
By Ferry from Tokyo (Takekai)
The most common and economical route. Ferries depart from Takekai Port in Tokyo, not the more central Tokyo or Yokohama ports used for other routes. This is a common point of confusion.
- Operator: Tōkai Kisen
- Travel Time: Approximately 3.5 to 4 hours on the regular ferry. There's also a faster "jet" ferry that takes about 2 hours, but it runs less frequently and is more weather-dependent.
- Cost (One Way): Regular ferry: ~¥7,000 for second class. Jet ferry: ~¥11,000.
- Key Advice: Book online as far in advance as possible, especially for weekends and holidays. The regular ferry is large and stable, but if you're prone to seasickness, take medication 30 minutes before departure. The jet ferry is smoother but costs significantly more.
By Air from Chofu Airport
For a stunning aerial view and to save half a day.
- Operator: New Central Airservice
- Departure: Chofu Airport in western Tokyo (accessible by train from Shinjuku).
- Travel Time: About 45 minutes.
- Cost (One Way): Typically between ¥18,000 and ¥25,000.
- Key Advice: Flights use small 9-seater planes. Book months in advance. Weight restrictions for luggage are strict—pack light. The flight offers incredible views of the Izu peninsula and the islands.
| Transport Method | Departure Point | Travel Time | Approx. Cost (One Way) | Best For |
|---|---|---|---|---|
| Regular Ferry | Takekai Port, Tokyo | 3.5-4 hours | ¥7,000 | Budget travelers, those not in a hurry |
| Jet Ferry | Takekai Port, Tokyo | ~2 hours | ¥11,000 | Faster sea travel, less prone to seasickness |
| Small Plane | Chofu Airport, Tokyo | 45 minutes | ¥18,000-¥25,000 | Time-saving, scenic views, higher budget |
Top Things to Do on Kozushima Island
Don't just lie on the beach all day (though you could). The island rewards exploration.
1. Hike the Tenjosan Crater Trail
This is non-negotiable. The hike to the crater rim is moderate, taking about 60-90 minutes round trip from the closest parking area. The path winds through dense, humid forest before opening up to the vast, grassy crater. You're not climbing a peak; you're walking around the rim of a giant, dormant bowl. The 360-degree view of the entire island and the deep blue Pacific is the payoff. Go early in the morning to avoid the heat and potential afternoon clouds.
2. Explore the Beaches: Maehama and Nagahama
Maehama Beach is the poster child—a 1.2km stretch of powdery white sand. It's beautiful, family-friendly, and has facilities. Nagahama Beach, on the west coast, is wilder. The sand is coarser, the waves are often bigger, and it's backed by dramatic cliffs. It feels more secluded. For snorkeling, the rocky coves near Tako Beach (south of Maehama) often have clearer water and more marine life.
3. Witness the Akazaki Lava Formations
Located on the southwest coast, this area showcases the island's violent volcanic past. Jagged black lava rocks have been sculpted by the sea into surreal shapes. There's a short, well-maintained walking path. Visit in the late afternoon when the setting sun casts long shadows and intensifies the black-rock-and-turquoise-sea contrast. It's a photographer's dream.
4. Rent a Bicycle or Scooter
Public buses exist but are infrequent. To truly explore, you need your own wheels. Several shops near the port rent electric bicycles (great for the hills), regular bicycles, and 50cc scooters (no special license needed for the scooter if you have a valid car license from many countries, but check current rules). Circumnavigating the island's coastal road is about 20km—a perfect half-day bike ride with plenty of stops.
Where to Stay and Eat on Kozushima
Accommodation is mostly small, family-run ryokan (inns) and minshuku (guesthouses). Large hotels are absent, which is part of the charm.
- Minshuku Yamaguchi-ya: A classic, friendly minshuku a short walk from Maehama Beach. The owners are incredibly kind, the home-cooked dinners featuring local fish are a highlight, and it offers great value. Expect shared bathrooms. Rates around ¥9,000 per person per night including breakfast and dinner.
- Pension Green Hill: A Western-style pension with private rooms and bathrooms. It's on a hill with ocean views, quieter than places in the main village. Good for those wanting more privacy. Rates from ¥12,000 per person with meals.
- Kozushima Onsen Yurahama: If you want an onsen (hot spring), this is your spot. It's a day-use facility with indoor and outdoor baths overlooking Yurahama fishing port. You can also stay here in simple rooms. The outdoor bath at sunset is magical. Day use: ¥800.
For food, don't expect a thriving restaurant scene. Most visitors eat at their lodging. For lunch, try Shokudo Marumiya near the port for a hearty katsu-don (pork cutlet bowl) or fresh sashimi teishoku (set meal). Cafe Terrace offers coffee, light meals, and a terrace view. The local specialty is katsuo (bonito) – if you see it on a menu, order it.
A Perfect 3-Day Kozushima Itinerary
This balances activity with the island's slow rhythm.
Day 1: Arrival & Ocean Immersion
Morning: Arrive by ferry or plane. Pick up rental bicycles.
Afternoon: Head straight to Maehama Beach. Swim, relax. Late afternoon, bike to the Akazaki Lava Formations.
Evening: Check into your minshuku and enjoy a seafood dinner.
Day 2: Volcanic Heart & Island Loop
Morning: Early start for the Tenjosan Crater hike. Pack water and snacks.
Afternoon: After descending, bike the island loop road. Stop at Nagahama Beach and any quiet coves that catch your eye.
Evening: Soak at Yurahama Onsen as the sun sets.
Day 3: Relaxation & Departure
Morning: A final swim, last-minute souvenir shopping at the port shops (local sea salt or camellia oil are good picks), or a quiet coffee.
Afternoon: Depart on your chosen transport.
Can I visit Kozushima if I don't speak Japanese?
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