Cycling the Shimanami Kaido, Island to Island
There's a route in western Japan where you ride a bicycle across the sea — not on a ferry, but on dedicated cycling lanes built into a chain of suspension bridges linking six islands between Honshu and Shikoku. Roughly seventy kilometers of island roads, citrus groves, fishing ports and blue water, with a painted line on the tarmac telling you exactly which way to go. It's regularly called one of the world's great cycling routes, and it requires no particular fitness at all.
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Built for Bikes, Genuinely The Nishiseto Expressway crosses the Seto Inland Sea from Onomichi in Hiroshima to Imabari in Ehime, and when it was built each bridge got a separated cycling and pedestrian lane with its own gently graded approach ramp. That last detail is what makes the route accessible: instead of climbing to bridge height, you spiral up a long, shallow ramp. A blue line painted along the entire recommended route means you never need a map. That design is also why the route is rideable by people who are not cyclists — the ramp gradients are shallow and consistent and the island roads between bridges are flat to rolling.
The Islands Are the Point Mukaishima, Innoshima, Ikuchijima, Ōmishima, Hakatajima and Ōshima each have their own character — Innoshima's pirate history from the Murakami clan who once controlled these straits, Ikuchijima's citrus terraces and art museum, Ōmishima's Ōyamazumi Shrine, which holds an extraordinary collection of armour and weapons donated by warriors over the centuries. You can stop anywhere; the ferries mean you're never committed. Ikuchijima also has a temple complex of unrestrained decorative excess and a hillside of marble sculpture, if shrines and citrus groves alone aren't reason enough to stop.
The Practicalities That Make It Easy Rental terminals sit at both ends and on the islands, and many let you drop the bike at a different terminal than you collected it. Luggage forwarding between the two ends means you ride with nothing on your back. Electric assist bikes are widely available, which flattens the modest climbs for anyone unsure about the distance. The full run is around seventy kilometres. Book ahead on spring and autumn weekends, when the route gets busy with domestic riders, and bring sun protection regardless of season — there's a great deal of open water and very little shade on the bridges.
One Day or Three A fit rider does the full route in a long day. The better version takes two or three, stopping overnight on Ikuchijima or Ōmishima, eating at island ports, and finishing at Imabari — which is both Japan's towel-making capital and the gateway to Matsuyama and Dōgo Onsen, arguably the oldest hot spring bathhouse in the country. Ending a cycling trip in a 19th-century wooden bathhouse is a hard combination to beat.
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- 1Ride south from Onomichi to Imabari. Conditions generally favour that direction and it finishes near one of Japan's oldest hot springs.
- 2Take an e-bike if you are unsure. Seventy kilometres is still seventy kilometres, and the assist turns a hard day into an easy one.
- 3Split it over two days with a night on Ōmishima or Ikuchijima. The islands after the day-trippers leave are the best part of the route.
- 4Follow the blue line painted on the road. It is a complete navigation system and you can put the phone away.
- 5Book rentals ahead on spring and autumn weekends, and arrange a one-way drop-off at the far end rather than doubling back.
- 6Wear sun protection whatever the month. The bridges are exposed and the water reflects everything back at you.
The Shimanami Kaidō is the easiest way into the Seto Inland Sea, and it connects two regions most itineraries treat separately — Hiroshima at one end and Shikoku at the other. Our Hiroshima three-day route covers the mainland side, and the Ehime prefecture page picks up where the bridges land.
Hinato
Hinato lives in Miyazaki, Japan and is the sole operator of Fudoki Japan, an independent English-language guide to the country's lesser-known places across all 47 prefectures. Drafting is AI-assisted; every page is reviewed by a person before it goes live, and that person is answerable for it.
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