Photo by Mesut Kaya on Unsplash
At the very top of Japan’s map, past where the trains stop making sense and the phone signal gets patchy, two round islands sit in the Sea of Japan off Wakkanai: Rebun and Rishiri. One is flat and covered in wildflowers that bloom at sea level instead of up a mountainside. The other is a single volcanic cone rising straight out of the ocean. Together they’re one of the more rewarding detours in Hokkaido for travelers who’ve already done Sapporo, Furano, and Otaru and want somewhere the tour buses don’t reach.
Where These Islands Are, and Why Bother
Rebun and Rishiri sit roughly 40-60 km off Wakkanai, Japan’s northernmost city, and are close enough to each other that a short ferry connects them directly. Rishiri is dominated by Mt. Rishiri (Rishiri-Fuji), a 1,721 m stratovolcano that fills almost the entire island — its silhouette is the reason people call it “the Fuji of the north.” Rebun is lower and rockier, famous as a flower island: because of the cold, foggy northern climate, alpine plants that would normally only grow near mountain summits bloom right along its coastal cliffs, no climbing required. If you’ve enjoyed the flower fields at Furano and Biei, this is a wilder, saltier version of the same idea.
Getting to Wakkanai First
Everything starts in Wakkanai. From Tokyo, ANA flies direct into Wakkanai Airport (about 3.5 hours); from Sapporo’s New Chitose Airport it’s around 50 minutes by air. The overland option is the JR Limited Express Soya from Sapporo Station, a roughly 5-hour ride up through Asahikawa — worth booking a reserved seat, and if you want a bit more comfort for that long haul, it’s the kind of train where upgrading matters, similar to the calculus in our Green Car and Gran Class guide. Rail fans collecting station stamps will also find plenty to add to a notebook along the Soya Main Line — see our piece on eki stamp rallies if that’s your thing. Budget a night in Wakkanai either way, since the first ferry out is early morning.
Ferries: Fares, Times, and Booking
Heartland Ferry runs the routes: Wakkanai to Oshidomari (Rishiri) takes about 1 hour 40 minutes, Wakkanai to Kafuka (Rebun) about 1 hour 55 minutes, and the short hop between Oshidomari and Kafuka takes roughly 40 minutes. Expect second-class one-way fares in the ballpark of ¥2,700-3,000 for the mainland-to-island routes and around ¥1,000-1,500 for the inter-island crossing — always check Heartland Ferry’s current timetable and fares before you go, since schedules thin out sharply outside summer and seas here can be rough enough to cancel sailings on short notice. In peak July-August season, book at least a few days ahead, especially if you’re also reserving a rental car on Rishiri. A common mistake is planning a single tight day-trip to one island; ferries are infrequent enough that missing the last boat back means an unplanned overnight.
Best Time to Go
The window that matters is June through August. Rebun’s wildflowers peak from mid-June to late July; by September most are done and many guesthouses and rental shops start closing for the season. Summer highs only reach about 20-24°C, fog rolls in without warning, and Mt. Rishiri is frequently capped in cloud even on sunny beach days below — pack a windproof layer no matter the forecast. From October the islands shift into a long, harsh winter with drastically reduced ferry service, so this really is a summer-only trip for most visitors.
Rebun Island: The Flower Trails
Rebun’s signature activity is the “8-Hour Course” (Hachijikan Course), a coastal trail running from Cape Sukoton at the island’s northern tip down to Motochi, passing cliffs, fishing hamlets, and meadows thick with species found almost nowhere else, including the endemic Rebun edelweiss (Rebun usuyukiso) and Rebun’s own lady’s slipper orchid (Rebun atsumori-sou). It’s a genuine full-day hike, not a stroll, so most people take a bus or taxi to the Sukoton starting point in the morning and catch a return bus from Motochi in the late afternoon. If eight hours sounds like too much, shorter 4-hour and 2-hour sections cover the best flower terrain without the full commitment — ask at the Kafuka ferry terminal tourist information desk for the current bus schedule, since it’s built around the hiking trail and changes seasonally.
Rishiri Island: Volcano and Coastal Loop
Rishiri offers two very different paces. Climbing Mt. Rishiri itself is a serious undertaking — a 10-11 hour round trip from near sea level, open roughly July to September, with no mountain hut for overnight shelter and no water sources on the upper slopes, so it demands an early start, real hiking gear, and a clear weather window. Most visitors instead rent a bicycle or small car at Oshidomari port and circle the roughly 60 km coastal road that rings the island’s base, stopping at Himenuma Pond (which mirrors the volcano on calm days), Peshi Cape, and local uni and seafood stalls along the way. A day’s car rental runs roughly ¥6,000-8,000; bicycles are considerably cheaper and are the more popular choice given how flat the loop road is.
Eating, Sleeping, and Practical Mistakes to Avoid
Both islands are famous for uni (sea urchin), in season roughly June through August, and Rishiri kombu, considered among Japan’s finest kelp and the base for much of the country’s high-end dashi. Try uni-don at a port-side shokudo in Oshidomari or Kafuka for somewhere in the ¥3,000-5,000 range depending on the season and grade. Accommodation on both islands leans heavily toward small family-run minshuku, typically ¥7,000-10,000 per person with two meals included, plus a handful of proper hotels near each port for those who want a splurge with private bathrooms and sea views. Book ahead in July and August — room counts are small and fill fast.
The biggest practical trap: convenience stores are scarce to nonexistent on both islands, and card acceptance is inconsistent outside hotels, so bring more cash than you think you need. Cell coverage also gets patchy on Rishiri’s mountain trail and Rebun’s northern coast, so download offline maps and tell your accommodation your hiking plan before you set out. If you’re stitching this into a longer remote-Japan itinerary, the same “go slow, plan ferries carefully” mindset applies here as with Japan’s other island detours — see our guide to Japan’s cat islands for a similar small-boat, small-town rhythm further south. Give Rebun and Rishiri at least two full days, ideally three, and you’ll come away with a side of Hokkaido almost no first-time visitor sees.