The Shimanami Kaido by Bike: A 2026 Cycling Guide

The Shimanami Kaido is the great cycling road of Japan — a seventy-kilometre chain of soaring bridges and quiet islands that links Imabari in Ehime to Onomichi in Hiroshima across the Seto Inland Sea. It is the only place in the country where you can ride a bicycle across the open sea from island to island on a dedicated lane, and it has become one of the world’s celebrated bike routes. This guide explains how to ride the Ehime half from Imabari, what the bridges and islands hold, how the one-way rental system works, and where to sleep mid-route — with the honest note that this is an outdoor adventure rather than a luxury one, and the joy is in the sea and the road.

At a glance — Duration: 1–2 days. Cost band: low–mid (bike rental from ~¥2,000/day, small bridge tolls, island lodging, approx., 2026). Best season: spring and autumn for mild riding; avoid the heat of midsummer afternoons. Who it’s for: active travellers, cyclists, families with teens. Base: a cyclists’ lodge on Omishima.

How the route works

The full Shimanami Kaido runs about seventy kilometres over six islands and their connecting bridges. Each bridge carries a separate cycling and pedestrian lane, reached from the road by long, gently graded looping ramps that keep the climbs manageable, and the route is marked the whole way by a blue line painted on the road surface — follow it and you cannot get lost. You can ride the whole thing in a long day if you are fit, but splitting it over two days, sleeping on an island midway, turns it from an endurance ride into a proper journey.

The genius of the system is the rental network. The main southern gateway is Sunrise Itoyama, at the Imabari foot of the first bridge, the largest of the route’s cycle terminals, with a huge fleet of city bikes, cross bikes, e-bikes and tandems. You pick up a bicycle here and can drop it at any of the terminals up the route — so you are never obliged to ride back. One important 2026 note: at Sunrise Itoyama only the rental operation is running. Its on-site accommodation and restaurant are closed while the site is redeveloped, so buy water and snacks in Imabari first and do not plan to eat or sleep at Itoyama itself. For most riders an e-bike makes the bridges and the distance comfortable.

The bridges and the islands

Before you start, the sea-level keep of Imabari Castle is worth an hour. Designed in 1604 by Todo Takatora, the greatest castle engineer of his age, it sits right at the edge of the sea with a wide moat that fills with seawater and rises and falls with the tide; grey mullet swim in the moat, and the keep gives a view over the harbour and the islands you are about to ride.

The showpiece of the whole road is the first crossing, the Kurushima Kaikyo Bridge — not one bridge but three great suspension bridges strung end to end for about four kilometres, the longest series of suspension bridges in the world when it opened, with the cycling lane running the entire span. Far below, the Kurushima Strait is one of the fastest and most dangerous tidal races in Japan, where whirlpools spin and ships thread a marked channel; from the deck you ride at the height of the gulls with the Inland Sea opening on both sides. It is the single most exhilarating stretch of the route.

The bridges land you on a string of islands, each with its own character. Oshima, the first, is the place to stop for lunch from the sea and to visit the Murakami Kaizoku Museum, the only museum in Japan devoted to the medieval Murakami sea-lords — often called pirates, but in truth the masters of this strait, who guided, taxed and protected the ships passing through the islands and could field navies that decided the wars of the warlords. Omishima holds Oyamazumi Shrine, the head shrine of a god of mountains and seas, set in a grove of camphor trees said to be over a thousand years old. For centuries warriors dedicated their armour here, and the shrine’s treasure halls now hold the single greatest collection of historic Japanese arms and armour in the country. Its halls keep short hours and close mid-afternoon (last entry around 15:30), so visit early in the day. From Omishima the elegant cable-stayed Tatara Bridge — for a time the longest of its kind in the world — leaps to the next island; clap your hands beneath one of its tall pylons and the sound runs up the structure and echoes back in a strange ringing whistle.

Imabari towels

Back toward the mainland, Imabari makes the finest towels in Japan — soft, absorbent, long-staple cotton towels that are a byword for quality across the country and increasingly abroad. The Towel Museum in the Asakura district is the strange and charming monument to the craft: part working factory with the looms running on its “Cotton Road” gallery, part design museum, part vast shop where you can buy the genuine Imabari article direct from the source. It is the natural last stop before returning the bikes, and the place to carry a piece of Ehime’s craft home.

Our Shimanami Kaido island cycling itinerary lays out the Ehime half over two days, with the castle, the great bridge and Oshima on day one and Oyamazumi, Tatara and the towel country on day two.

Where to stay

This is island and adventure territory, and Ehime’s islands do not pretend to a luxury tier. The honest, well-loved kind of lodging the Shimanami is built around is a cyclists’ lodge like WAKKA, near Inokuchi Port on Omishima — cottages, glamping domes and dorm beds on the shore, with bike racks and repair stands at the door and a terrace looking out over the Inland Sea. It is exactly right for the route: a hot shower, a cold drink, a place to lock the bikes and a sunset over the water before an early start. There are guesthouses and small hotels on every island, and Imabari and Onomichi have conventional business hotels at each end if you prefer to ride out and back from a fixed base.

Riding tips

Distances are real, so plan the day around your pace and the bridge tolls (small, and sometimes waived in promotions). Carry water and snacks — shops thin out on the islands — and start early in summer to beat the afternoon heat. The blue line is your friend; the official cycling route is sometimes a little longer than the car road because it takes the gentler bridge ramps. If you are not a confident cyclist, an e-bike transforms the experience, and you can always shorten the ride by using the route’s frequent bus services, which carry bikes, to skip a section. The route can equally be driven if cycling is not for you, but the bridges are made for bikes, and that is how to feel the place.

FAQ

How long does it take to cycle the Shimanami Kaido? A fit rider can complete the full seventy kilometres from Imabari to Onomichi in a single long day, roughly six to nine hours including stops. Most people enjoy it more split over two days with a night on an island, which leaves time for the shrines, the museums and lunch by the sea rather than just pedalling.

Where do I rent a bike, and can I drop it off elsewhere? The main terminal is Sunrise Itoyama at the Imabari end, with the largest fleet, and there are rental terminals all along the route. The one-way system lets you return the bicycle at any terminal, so you do not have to ride back. Note that in 2026 Sunrise Itoyama offers rentals only — its lodging and restaurant are closed for redevelopment.

Do I need to be a strong cyclist? No. The bridge ramps are graded gently and the route is flat to rolling, and an e-bike makes it comfortable for most people. You can also shorten the ride by putting your bike on the route buses for a section. Confident riders on road bikes will find it easy; casual riders should allow more time and consider the e-bike.

Which way should I ride — from Imabari or from Onomichi? Both work. Starting from Imabari in Ehime lets you tackle the spectacular Kurushima triple bridge first while you are fresh, and ends near the towel country and Matsuyama. Riders combining the route with Hiroshima often start from Onomichi instead. The blue line guides you in either direction.

For a complete contrast — the hot springs and original castle of Ehime’s capital — see our Matsuyama, Dogo Onsen and castle guide.

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