Technically part of Tokyo, Toshima feels like another country. It’s a near-perfect volcanic cone rising out of the Pacific roughly 140 kilometers south of the capital, home to fewer than 300 people, no convenience stores, and no traffic lights. Of the Izu Seven Islands administered by the Tokyo Metropolitan Government, Toshima is the smallest in population and arguably the hardest to reach on a schedule — which is exactly why it’s worth the effort if you want a genuinely remote island day or two without leaving the Tokyo prefecture on paper.
Where Toshima Is and Why So Few Visitors Make It There
Toshima is about 4 square kilometers, shaped almost like a perfect circle around its central peak, Mt. Miyatsuka, which tops out around 508 meters. There’s one village, one port, one school, and one road that circles the coast. Unlike several of its neighbors in the Izu chain, Toshima has no airport and no helicopter link — Oshima, Niijima, and Hachijojima all have air access, but Toshima can only be reached by boat. That single bottleneck, combined with a harbor that’s exposed to swell, keeps visitor numbers low even in peak season.
How to Get There
Tokai Kisen runs the only scheduled service. The large overnight ferry departs Tokyo’s Takeshiba Pier around 22:00 and reaches Toshima before dawn, roughly 8 hours later, with second-class one-way fares typically landing somewhere around ¥7,500–8,000 (fares are adjusted periodically, so check Tokai Kisen’s site before booking). From spring through autumn, a faster jet ferry also runs daytime service from Takeshiba, cutting the trip to around 2.5–3 hours for a higher fare, usually in the ¥12,000–14,000 range one-way.
The detail that catches people out: Toshima’s port only has deep, sheltered water on one side of the island. When swell comes from the wrong direction, the ferry simply can’t dock and continues on to the next island without letting anyone off — or picks up without stopping for pickup. This happens more often here than at most other Izu islands. Build at least one buffer day into your itinerary, avoid booking a tight flight or shinkansen connection for the day you’re due back in Tokyo, and check the Tokai Kisen operational status page the morning of travel.
Best Time to Visit
There are really two seasons worth planning around. Camellia (tsubaki) blossoms peak from December through February, when the hillsides that cover most of the island turn into a dense canopy of dark green leaves and red flowers — this is also the quietest, coolest, and roughest-sea time of year, so expect more cancellations. Summer, roughly June through September, brings calmer crossings, warm water for diving and snorkeling, and the best odds of the ferry actually running on schedule. If your priority is simply setting foot on the island and getting back reliably, summer is the safer bet; if you want to see what Toshima is actually famous for, winter is the payoff.
What Toshima Is Actually Known For
Camellia oil is the island’s defining industry. An estimated 200,000 or so camellia trees blanket Toshima’s slopes, planted generations ago to stop erosion on the steep volcanic terrain, and their seeds are pressed into tsubaki oil — a clear, light cosmetic and hair oil that islanders say accounts for a large share of all the camellia oil produced in Japan. Small bottles are sold at the one or two general stores near the port and occasionally directly from producers; prices for a small bottle (around 30–50ml) are usually in the ¥1,500–3,000 range. As with any small-batch regional craft product, it’s worth asking whether what you’re buying was actually pressed on Toshima rather than blended elsewhere — the same buyer-beware instinct that applies to shopping for genuine Kiso Shikki lacquerware in Nagano applies here.
The other reason divers specifically seek Toshima out is water clarity and pelagic sightings — the island sits in a current that keeps visibility exceptionally high, and early summer occasionally brings schools of hammerhead sharks past well-known local dive points. The one or two dive shops on the island rent gear and run guided boat dives; expect to pay roughly ¥15,000–20,000 for a two-tank day including equipment, in line with typical Izu Islands dive shop rates, though it’s worth confirming current pricing directly since options are limited and seasonal.
Where to Stay and Eat
There are no hotels on Toshima — accommodation is a handful of family-run minshuku (guesthouses), maybe five or six in total, almost all clustered near the port village. Most operate on a two-meals-included basis, with dinner built around whatever was caught that day, and typical per-person rates with breakfast and dinner run somewhere around ¥8,000–12,000 a night. Because the island is so small, book well ahead — there’s no overflow capacity if a place is full, and a cancelled return ferry can leave you needing an unplanned extra night. There’s no campground to fall back on, so don’t treat camping as a backup plan. Budget travelers should expect Toshima to cost more per night than a comparable stay in central Tokyo, simply because everything — food, fuel, supplies — arrives by the same ferry you did.
Common Mistakes to Avoid
- Booking a same-day return connection. With no air option and a harbor that can close without much notice, treat the ferry schedule as a rough guide, not a guarantee.
- Assuming you can buy supplies on arrival. There’s no convenience store and only a couple of small general stores with limited stock and limited hours — bring cash, any specific snacks or drinks you want, and sunscreen.
- Underestimating the terrain. The island’s one road climbs steeply from the port; comfortable footwear matters more here than on flatter islands.
- Not checking cell coverage expectations. Signal exists in the village but can be patchy elsewhere on the island, so don’t rely on real-time navigation once you’re off the main road.
If You Like Toshima, Where Else to Look
Toshima rewards the same instinct that drives people toward other under-the-radar day-trip destinations in Japan — somewhere quiet enough that you notice the difference immediately. If a slower, nature-first escape appealed to you here, Kyoto’s Kurama and Kibune river valley offers a similarly low-key alternative without the ferry logistics, and Toyama’s Shomyo Falls is another record-holding natural site that most visitors to Japan never get around to seeing, despite being far easier to reach than Toshima is.