Overview
Mikurajima is a small volcanic island in the Izu Islands chain, administered as part of Tokyo Metropolis (Miyake Subprefecture). It sits roughly 200 kilometres south of central Tokyo and covers about 20 square kilometres, with a permanent population of only a few hundred residents. Despite its administrative address reading 'Tokyo,' the landscape is dramatically different from the metropolis: dense laurel forest covers steep hillsides, and the surrounding sea is remarkably clear.
The island is perhaps best known internationally for its resident community of wild bottlenose dolphins, which inhabit the waters year-round. Swimming with these dolphins in a responsible, guided format has become the island's signature activity and the primary reason most visitors make the journey. Conservation is taken seriously here — the island and surrounding waters are part of a protected zone, and visitor quotas are enforced.
Beyond dolphins, Mikurajima offers hiking through old-growth forest, birdwatching (the island is an Important Bird Area), and a genuinely quiet, unhurried pace of life. Mobile phone coverage is limited, accommodation options are few, and that is largely the point. Visitors who arrive expecting resort amenities will be disappointed; those seeking an authentic encounter with nature will find it rewarding.
Before You Go
Visitor Quotas and Permits
Mikurajima enforces strict daily limits on visitors, particularly for dolphin-swimming activities. Reservations for guided dolphin swims must be made well in advance through licensed local operators, and availability is limited. Do not arrive expecting to book on the spot, especially during peak summer months.
Visas
Japan has its own entry requirements that vary by nationality. For current visa rules applicable to your passport, check TravelerPulse's Visas section and the official website of the Japanese Ministry of Foreign Affairs.
What to Pack
- Snorkelling or swimming gear (some operators provide equipment, verify in advance)
- Sturdy footwear for forest trails
- Rain gear — the island receives significant rainfall
- Cash: the island has very limited banking and card payment infrastructure; bring sufficient yen from the mainland
- Any prescription medications you need, as pharmacy access is extremely limited
Connectivity
Expect limited or no mobile coverage in many parts of the island. Download offline maps and any information you may need before departing the mainland.
Getting There
Mikurajima is reached by ferry from Takeshiba Pier in Tokyo. The Tokai Kisen ferry service operates on this route, but schedules, frequency, and travel times vary seasonally — some sailings are overnight. Verify current timetables and book tickets directly with the operator well ahead of your trip, particularly in summer.
There is a small airstrip on Mikurajima served by New Central Airservice (NCA) with flights from Chofu Airport in western Tokyo. These flights are on small aircraft, seats are limited, and services can be cancelled due to weather. Confirm schedules and availability directly with the airline.
Weather cancellations are a real factor for both ferry and air services. Build flexibility into your itinerary and do not schedule a tight connection from Mikurajima back to an international flight.
Getting Around
The island is small enough that much of it can be explored on foot, and hiking is in fact the primary way to see the interior forest. Roads exist but are limited, and there is no public bus network in the conventional sense. Some accommodation providers may arrange or advise on local transport options — verify this when booking.
Renting a bicycle or scooter is worth asking about locally, though availability is not guaranteed. Dolphin-swimming activities depart by boat from the harbour, arranged through licensed operators. Walking between the village, harbour, and some trailheads is generally feasible.
Where to Stay
Accommodation on Mikurajima is extremely limited. Options consist primarily of small guesthouses (minshuku) run by local families. Many of these operate on a meals-included basis (breakfast and dinner), which is practical given the limited dining options on the island. Total accommodation capacity across the island is small, which reinforces the need to book months ahead for peak season.
Expect simple, clean rooms rather than hotel-style amenities. Communication with hosts may require basic Japanese or the use of a translation app, as English proficiency varies. Verify current available properties through Japan Tourism Agency resources or the Tokyo Islands tourism portal, as individual establishments open and close over time.
Things to See & Do
Swimming with Wild Dolphins
This is the activity most visitors come for. Licensed local guides lead small groups into the water to snorkel alongside resident bottlenose dolphins. Participation is regulated: guides assess sea conditions daily and can cancel swims, and there are rules about how participants interact with the animals. This is not a performance or a controlled encounter — the dolphins are truly wild and encounters are not guaranteed.
Hiking and Forest Exploration
Mikurajima's laurel forest is old-growth and ecologically significant. Several trails wind through the interior. Some trails require a licensed local guide — this rule exists to protect both visitors and the environment, so check current requirements before setting out independently.
Birdwatching
The island is an Important Bird Area recognised by BirdLife International. Species including the Ijima's Leaf Warbler (endemic to the Izu Islands) have been recorded here. Bring binoculars.
Snorkelling and Sea Exploration
Beyond dolphin swims, the surrounding waters offer good visibility for snorkelling. Coordinate with local operators for safe entry points and conditions.
Food & Drink
Dining options outside of guesthouse meals are very limited. There are a small number of local eateries in the village, and a few shops, but do not expect a range of restaurant choices. The island's location and small population mean that fresh produce and supplies arrive by ferry, so availability can be affected by weather-related service disruptions.
Seafood features prominently in local cooking given the island's maritime setting. Guests staying at minshuku typically eat what is served, which is usually home-cooked Japanese food using locally available ingredients. Dietary restrictions should be communicated to your host in advance — and ideally in Japanese.
Alcohol is available but in limited variety. Stock up on any specific items at Takeshiba or a Tokyo convenience store before boarding the ferry.
Practical Information
Cash
Bring all the cash you expect to need. ATM access on the island is extremely limited and card payments are not widely accepted. Yen can be obtained from convenience store ATMs (7-Eleven, Japan Post) in Tokyo before departure.
Emergency Services
Japan's national emergency numbers are 110 (police) and 119 (fire and ambulance). Medical facilities on the island are minimal — serious medical emergencies would require evacuation to the mainland, which depends on weather and transport availability. Travel insurance that includes medical evacuation coverage is strongly advisable.
Weather
The island is subject to typhoons, primarily from late summer into autumn. Always check weather forecasts before and during your stay. Ferry and flight cancellations during typhoons can strand visitors for multiple days — plan accordingly.
Electricity and Water
Japan uses 100V, 50/60Hz with Type A plugs. Tap water in Japan is generally safe to drink; verify locally for Mikurajima.
Safety
Mikurajima is a low-crime environment by any standard. The main safety considerations are environmental: sea conditions can change quickly, trails can be slippery in wet weather, and the remote location limits emergency response capability. Always follow guide instructions during water activities and do not enter the water or hike remote trails alone without proper planning.
The island is in a seismically active region of Japan. Familiarise yourself with basic earthquake and tsunami procedures — your guesthouse host can advise. Japan has well-established public alert systems for natural disasters.
Travel insurance with medical evacuation coverage is genuinely important here, not a formality.
Local Culture & Etiquette
Mikurajima's small, close-knit community has adapted its economy significantly around nature tourism, particularly dolphin swimming, but residents maintain a strong sense of stewardship toward their natural environment. Visitors are guests in a working community, not a resort destination, and behaving respectfully toward both residents and the natural environment is expected.
Follow all conservation guidelines without exception — rules around dolphin interaction exist to protect animal welfare and the long-term viability of the activity. Do not touch the dolphins, do not chase them, and follow your guide's instructions at all times. Violations can result in removal from the water and damage the community's tourism licence.
Basic Japanese courtesy goes a long way: greet hosts and residents politely, remove shoes when indicated, and keep noise levels low in residential areas.
