Why the Shimanami Kaido Belongs on Every Cyclist's Bucket List

Stretching roughly 60 kilometres across the Seto Inland Sea, the Shimanami Kaido links the main island of Honshu with Shikoku through a chain of six small islands connected by seven spectacular bridges. It is one of the world's most celebrated bike routes, drawing riders from every corner of the globe, and it has a particular pull for travellers from Australia.

For Sydneysiders, Melburnians and Brisbanites alike, the journey offers the kind of long, scenic ride that feels familiar and yet entirely foreign. The daily distances are manageable, the support infrastructure is world-class, and the cultural rewards waiting on each island, from fresh citrus to ancient temples and hilltop viewpoints, make every pedal stroke worthwhile.

A bridge-lined route through the Inland Sea

The journey begins in Onomichi, a hillside port town in Hiroshima Prefecture, and finishes in Imabari, a castle town on the Shikoku side. Between the two lie Mukaishima, Innoshima, Ikuchijima, Omishima, Hakatajima and Oshima, each with its own beaches, fishing harbours and quiet rural lanes. The seven bridges that string them together, including the soaring Kurushima Kaikyo crossing, give the ride its distinctive rhythm: climb, glide, descend, repeat.

Cyclists typically allow three to four days for a comfortable trip, though many Australians with a strong touring background complete the route in two. The path is well signed in English and Japanese, and the gradient is forgiving even for recreational riders, with the longest climbs rarely exceeding fifty vertical metres. Bridge sections are separated from vehicle traffic, creating an almost meditative flow across the water.

A climate that matches the Aussie outdoor lifestyle

The best window for the ride runs from mid-March through May, when the weather along the Setouchi region mirrors the mild autumn-and-spring conditions Australians know from cycling along the Yarra River or the Brisbane River paths. Temperatures hover between fifteen and twenty-four degrees Celsius, the wind stays manageable, and the islands are brushed with pale cherry blossoms that frame every coastal curve.

Summer brings heat and humidity, much like a Brisbane February, while winter can be crisp and quiet, similar to a Hobart morning in July. Australians accustomed to the variability of the Great Dividing Range or the dry heat of the Murray River basin will find the climate surprisingly easy to read. Layered clothing, a light rain jacket and reliable hydration are usually all that is required.

How the route connects to Australian cycling culture

Australia has long punched above its weight in two-wheeled adventure, from the Tour Down Under in Adelaide to the gravel scenes of Margaret River and the rail-trail networks of northern New South Wales. Riders who have pedalled the Great Ocean Road or tackled Tasmania's Wild West will recognise the same appetite for dramatic coastal scenery and quiet country lanes that defines the Setouchi ride.

The Shimanami Kaido elevates that experience with something distinctly Japanese, including onsen hot springs at the end of each day, family-run ryokan dinners featuring locally caught sea bream, and the gentle hospitality of farmers who hand out samples of mikan from their orchards. Bicycle hire, baggage transfer and repair shops are clustered at both ends, so the logistics feel more like a guided weekend than a hard expedition. For many Australian riders, that blend of wilderness and creature comfort is the perfect ratio.

Sights worth stopping for

The route packs a surprising density of attractions. On Omishima, the Oyamazumi Shrine holds a treasured collection of samurai armour and weapons, while the nearby observation platform looks out over the swirling currents of the Kurushima Strait. Innoshima offers a hilltop flower park and a small literary museum, and Oshima is home to the Kousanji Temple, a marble-and-glass complex often described as a mini Nikko of the Inland Sea.

The lemon and mikan orchards of Ikuchijima produce the citrus that has made Setouchi famous in Japanese kitchens, and cyclists are often waved in for a taste. Several islands also host outdoor contemporary art installations tied to the Setouchi Triennale, making the route a moving gallery as well as a ride. Quiet fishing harbours, salt-making workshops and tiny Shinto shrines tucked into forested headlands reward anyone willing to wander off the main path.

What to look out for along the way:

• Sunrise over the Seto Inland Sea from the Kurushima Kaikyo Bridge
• Cherry-blossom tunnels in late March, particularly around Innoshima
• The hillside temple complex at Kosanji on Oshima
• Citrus groves and roadside fruit stalls on Ikuchijima
• Theatrical sea bream and octopus meals at family-run inns
• Sunset views from the Tatara Bridge observation deck

Planning the trip from Australia

Flights from Sydney and Melbourne to Hiroshima or Tokyo are frequent, with carriers including Qantas, ANA and Jetstar offering competitive fares outside the Japanese Golden Week. From Hiroshima, a short local train ride brings you to Onomichi, where most riders arrange bicycle hire through one of the established shops near the ferry terminal. Travellers planning to skip the logistics can join one of the well-organised self-guided packages, which include accommodation, luggage forwarding and a hire bike delivered to the starting hotel.

The Australian dollar tends to stretch further in regional Japan than in Tokyo or Osaka, particularly when paying for ryokan stays and fresh seafood meals. Bringing a portable power bank, a universal adapter and a small first-aid kit is wise, as is downloading offline maps before departure. Most importantly, give yourself at least one extra day at either end, because Onomichi's temple alleyways and Imabari's castle ruins deserve a slow afternoon rather than a hurried checkout.

Pack the right gear before you leave home:

• A lightweight helmet and padded shorts suited to multi-day riding
• A compact rain jacket and arm warmers for the cooler bridge crossings
• A universal travel adapter compatible with Japanese outlets
• A reusable water bottle with cage mount for long stretches
• Sunscreen rated for Australian conditions, as UV stays strong even in mild Japanese spring weather
• A phone holder and offline maps for the dedicated cycling app

Book your ferry windows and ryokan stays well ahead of the spring season, and reach out to a travel-savvy local if you want help fine-tuning the route. The Shimanami Kaido rewards riders who plan patiently and pedal slowly, and it leaves most visitors with a quiet, lasting affection for the islands of the Inland Sea. Start sketching your own itinerary today and reserve those bridge-side inns before the cherry blossom season fills up.