The Shimanami Kaidō
Cycling from Island to Island Across the Inland Sea
Japan's greatest bike ride
Some rides are a means of seeing a place. The Shimanami Kaidō is the place itself – a seventy-kilometre ribbon of dedicated cycleway that leaps from island to island across the Seto Inland Sea, linking Japan’s main island of Honshu to Shikoku by way of six islands and a chain of soaring bridges. It is routinely named among the finest cycling routes on earth, and unlike so many things that carry that billing, it earns it. You ride high over turquoise straits, freewheel down through citrus groves to sleepy fishing harbours, and cross bridges so vast and elegant they seem to hang from the sky. For a great many people it becomes the single best day – or two – of their whole trip to Japan.
It is also, wonderfully, a ride almost anyone can do. The route is flat but for the gentle ramps up to each bridge, immaculately signposted by a blue line painted the entire way, and served by a network of rental terminals that let you pick up a bike at one end and drop it at the other. You do not need to be a cyclist to ride the Shimanami Kaidō. You need only a day or two, a sense of adventure, and the willingness to let a chain of small islands unfold in front of you at the pace of a bicycle.
This is one of Japan’s great long-distance rides. For the national picture – other famous routes, rules and rental across the country – see our companion guide, Can I See Japan by Bike?
The ride in brief
The Shimanami Kaidō runs roughly 70 kilometres between Onomichi, a hillside port town in Hiroshima Prefecture on Honshu, and Imabari, a castle city in Ehime Prefecture on Shikoku. Between them lie six islands — Mukaishima, Innoshima, Ikuchijima, Ōmishima, Hakatajima and Ōshima — stitched together by a series of magnificent bridges, with a short ferry hop at the Onomichi end.
It is a route you can shape to suit yourself:
One long day – the full 70 km takes a fit rider 6–8 hours and a beginner 8–10, sightseeing included. Doable, but a big day.
Two days – the classic and most rewarding option, with a night on one of the islands (Ōmishima or Ikuchijima are the usual choices), splitting the ride into two relaxed halves.
A half-day taster – ride from Onomichi as far as Ikuchijima (about 35 km), see its temple and famous gelato, and take a ferry or bus back.
The riding is flat and easy apart from the approach ramps to each bridge, which climb gently to gain the height to cross. The path is dedicated, well surfaced, and impossible to lose: just follow the blue line.
How fit do you need to be?
Less than you might fear. The most reassuring fact about the Shimanami Kaidō is that nearly half of the people who ride it each year are first-time cycling travellers – this is, for many, the first proper bike ride of their lives, and they finish it grinning. The route is flat, the surface is smooth, and there is nothing technical about it. What it asks of you is not strength or skill but a little stamina, and even that can be dialled right down by how you choose to ride it.
Here is the honest measure. If you are a reasonably regular rider, comfortable spending most of a day in the saddle, the full 70 km in a single day is well within reach — a long but thoroughly enjoyable outing. If you ride only occasionally, a single day may be a stretch, and the wise choice is simply to take two days (or even three), splitting the route into gentle half-days of around 35–40 km with four to five hours of relaxed riding each — the pace most recreational cyclists settle on, and the one the route’s own guides recommend. Broken up like this, the Shimanami is comfortably within the reach of almost anyone who can ride a bike for half an hour at a time and doesn’t mind a few hours of gentle activity.
The terrain works in your favour: it is friendly, not hilly. The only real efforts are the ramps up to each bridge — gradual, but noticeable — and there is no shame whatsoever in hopping off and pushing up the steeper ones; plenty of people do. The one place fitness genuinely bites is the optional detours, such as the steep climb to Kirosan Observatory on Ōshima: rewarding, but a proper haul, and entirely skippable if you’d rather stay on the flat.
And if any of this still gives you pause, there is a simple answer: rent an e-bike. An e-bike flattens the bridge ramps and takes the sting out of the whole route, putting it within easy reach of riders of any fitness level. Between the two-day option and the e-bike, there is really no reason for a nervous or occasional cyclist to be put off. Keep your daily distances realistic, start early, and let yourself stop as often as you like — that is the whole secret.
Which way should you ride it?
Most people start at Onomichi, and there is nothing wrong with doing so — it is the more atmospheric town, easier to reach, and the traditional starting point. But there is a quiet case, well known to locals, for riding the other way, from Imabari to Onomichi: the prevailing wind blows from the south-west, so heading north-east puts it at your back, and the route’s biggest climbs — the long approach to the spectacular Kurushima Kaikyō Bridge and the slopes of Ōshima — come early, while your legs are fresh, rather than as a sting in the tail.
For most visitors, though, the practicalities of getting there decide the direction, and Onomichi is the more common and convenient start. Whichever way you go, the ride is glorious; this is a preference, not a rule.
What is it like to ride?
You begin, from Onomichi, with a little ferry — a two-minute hop across the channel to Mukaishima, bikes wheeled aboard, the town’s temple-dotted hills falling away behind. From there the blue line takes over, and the rhythm of the ride reveals itself: a stretch of quiet island road, then the long, curving ramp up to a bridge, then the crossing itself — the sea far below, the islands ranged ahead — before you descend to the next island and the pattern begins again.
Each island has its own character. Innoshima carries the legend of the Murakami kaizoku, the “sea lords” who once ruled these treacherous, tide-ripped channels — not quite pirates, but a refined seafaring clan whose story fills a museum on nearby Ōshima. Ikuchijima, roughly the halfway point, is the sunny “lemon island,” dotted with citrus groves, gelato shops and outdoor sculpture, and home to the extraordinary Kōsan-ji temple and the beautifully restored salt-merchant ryokan of Setoda. Ōmishima holds the ancient Ōyamazumi Shrine, a place of pilgrimage for warriors for a thousand years. And then, near the Imabari end, comes the showstopper: the Kurushima Kaikyō Bridge, a four-kilometre chain of three linked suspension bridges — one of the longest such structures in the world — that you cross high above the churning strait, the ride’s unforgettable finale.
Between the set pieces are the small, quiet pleasures that make the Shimanami Kaidō special: a bakery at the foot of a bridge, a roadside stand selling lemons and mikan, a fishing harbour where nothing much moves in the afternoon heat, a bench with a view of the sea you’ll remember longer than you expect. This is slow travel made physical — a whole seascape, crossed under your own power, one island at a time.
Renting a bike
The route is served by an excellent official rental network, Shimanami Japan, with around ten terminals along its length, including the main ones at Onomichi and Imabari stations. The system is built for this ride, and two features make it wonderfully simple:
- One-way returns are free on standard bicycles — pick up at one end, drop off at the other, no penalty. This is the key to riding the route one-way without doubling back.
- Helmets are included and required, and the bikes come with insurance and baskets.
Typical daily rates run around ¥3,000 for a standard bike and ¥4,000 for an electric-assist bike, with cheaper children’s bikes and some tandems available.
One important catch to know about e-bikes: at the time of writing, electric bikes generally must be returned to the terminal you hired them from — so they don’t suit a one-way crossing unless you’re prepared to loop back. For a one-way ride of the full route, a standard bike is the practical choice; if you want electric assistance for the whole crossing, check the current e-bike return policy carefully before booking, as the rules have been evolving. Reserve ahead in any case — bikes, and especially e-bikes, sell out in peak seasons and on event weekends.
Private operators such as Giant also have stores at both ends, renting higher-spec bikes; they typically charge an extra fee (around ¥3,300) for a one-way return.
The bridge tolls
The bridges once charged cyclists a small toll (a few hundred yen in total). Happily, these tolls are currently waived for cyclists as a measure to encourage tourism – reportedly until March 2028. It’s a small saving, but a nice one; just carry a little cash in case the position has changed by the time you ride, and note that the short ferry from Onomichi to Mukaishima still costs around ¥110 with a bike.
Getting there and away
To Onomichi: the Sanyō Shinkansen doesn’t stop at Onomichi itself — take it to Fukuyama, then a JR Sanyō Line local train about 20 minutes to Onomichi. Onomichi is an easy and pleasant place to spend the night before you ride.
To Imabari: on the Shikoku side, Imabari is reached by train from Matsuyama and Okayama, or by the **Shimanami Liner** highway bus from Fukuyama (about 90 minutes, cash only).
The one-way problem, solved: because you can drop your rental bike at the far end, most people ride one-way and return by public transport. Note that rental bikes cannot be carried on the trains or buses, so you return after dropping the bike. From Imabari, highway buses run back to Fukuyama and Onomichi; from Onomichi, trains and buses fan out across Honshu.
Luggage: a same-day luggage-delivery service (via Sagawa) runs between participating hotels in Onomichi and Imabari, so you can send your bag ahead and ride unburdened – well worth it.
Where to stay
Where you sleep depends on your plan. For a two-day ride, the classic choice is a night on one of the islands mid-route — Ōmishima and Ikuchijima are the favourites, the latter home to the celebrated Azumi Setoda ryokan and the cyclist-friendly WAKKA complex, both near the halfway mark. The islands are dotted with welcoming guesthouses (*minshuku*) and hostels used to cyclists’ early starts and muddy shoes.
For a one-day ride, spend the night before in Onomichi (or Imabari, if starting there) so you can collect your bike and set off early — an early start is the single best thing you can do to enjoy the route unhurried.
When to go
The Shimanami Kaidō rides well from spring through autumn, with late spring (April–May) and autumn (October–November) the loveliest — mild, clear and comfortable, with the islands’ citrus and, in spring, blossom. October brings the huge international cycling event, which is a thrilling time to ride but books out accommodation far ahead. Summer is hot, humid and bright — very doable, but start early, carry water, and mind the sun out on the exposed bridges. Winter is quiet and can be cold and windy over the water, though clear days are beautiful. Whatever the season, the wind matters more than the temperature out here: check the forecast, and remember the case for riding north-east with it behind you.
A journey to remember
The Shimanami Kaidō is more than a bike ride. It is a crossing — from one of Japan’s main islands to another, over a sea that has carried traders, pilgrims and sea lords for centuries, under your own steam and at your own pace. You finish it tired, salt-skinned and quietly elated, having earned every one of those seventy kilometres and every view that came with them. Few experiences in Japan so perfectly capture the spirit of travelling further to notice more. If you do only one long ride in the country — perhaps the only serious ride of your life — make it this one.
Need More information?
Official and authoritative
Visit Shimanami — official cycling site – the official route and rental-bike information from Shimanami Japan (English).
Setouchi Tourism Authority – the wider Seto Inland Sea region, with route ideas and island detail (English).
Japan National Tourism Organization – JNTO’s official travel site (English).
Rental
Shimanami Japan bike rental – the official terminal network, one-way returns and reservations (English).
Prices, toll waivers and rental policies change — please confirm current details directly with these sources before you ride. The cyclist toll waiver and e-bike return rules in particular have been subject to change.