The Ultimate Guide to the Omishima Cycling Loop: Exploring the Island of Gods and Oyamazumi Shrine

The Shimanami Kaido is world-renowned as a cyclist’s paradise, stretching across the shimmering Seto Inland Sea to connect Japan’s main island of Honshu with Shikoku. While many travelers rush through the route to complete the 70-kilometer journey in a single day, those in the know pause at Omishima. Known historically as the “Island of Gods,” Omishima serves as the spiritual and cultural heart of the Setouchi region. It is the largest island on the route and offers a unique blend of rugged coastal beauty, citrus-scented hillsides, and ancient samurai history.

The Omishima cycling loop is a detour worth every pedal stroke. Unlike the main “Blue Line” that cuts across the island’s midsection, the coastal loop allows you to immerse yourself in the slow pace of island life, passing through sleepy fishing villages and world-class architectural museums. At the center of it all lies Oyamazumi Shrine, a site so significant that it once drew legendary warriors from across Japan to pray for victory. Whether you are an avid cyclist or a leisure traveler looking for a deep dive into Japanese heritage, Omishima offers a profound connection to the land and sea that you simply won’t find anywhere else in Hiroshima Prefecture.

1. Getting to Omishima: Your Gateway from Onomichi or Imabari

Reaching Omishima is part of the adventure. Most travelers begin their journey in **Onomichi**, a charming hillside town in Hiroshima Prefecture. From Onomichi, you can rent a bicycle at the Onomichi Port terminal. If you are a seasoned cyclist, you can ride the 35–40 kilometers to Omishima, crossing the Mukaishima, Innoshima, and Ikuchijima islands along the way. The final bridge before Omishima is the stunning **Tatara Bridge**, a cable-stayed marvel that looks like the wings of a swan.

For those who prefer a more relaxed pace or have limited time, public transport and ferries are excellent alternatives. The **Shimanami Cycle Express** bus connects Onomichi directly to the Omishima BS (Bus Stop), allowing you to skip the first few islands and focus your energy on the Omishima loop. Additionally, ferries run from Onomichi or Mihara to various ports in the Setouchi area.

If you are coming from the Shikoku side, **Imabari** in Ehime Prefecture is your starting point. The ride from Imabari to Omishima is roughly 25-30 kilometers, involving the massive Kurushima Kaikyo Bridge. Regardless of your starting point, Omishima is centrally located, making it the perfect “halfway” destination for an overnight stay, allowing you to tackle the island’s perimeter loop with fresh legs the next morning.

2. Oyamazumi Shrine: The Spiritual Heart of the Seto Inland Sea

Long before the bridges were built, Omishima was a sacred destination reached only by boat. At the center of this devotion is **Oyamazumi Shrine**, dedicated to the god of mountains, seas, and war. For over a millennium, it has been the primary shrine for sailors and soldiers. Even today, members of the Japanese Maritime Self-Defense Force and modern-day sailors visit to pay their respects.

As you enter the shrine grounds, the first thing you will notice is the overwhelming sense of age. The path is lined with ancient, gnarled camphor trees. The most famous of these, the **Ochi-no-Mikoto**, is estimated to be over 2,600 years old. It is surrounded by a sacred straw rope (*shimenawa*), and legend says that if you hold your breath while walking around it three times, your wish will come true.

The shrine’s architecture is a stunning example of the *nagare-zukuri* style, characterized by asymmetrical curved roofs. However, the true treasure lies in the **Shimanami Treasury (Homotsu-kan)**. This museum houses one of the most significant collections of samurai weaponry and armor in Japan. Remarkably, it contains about 80% of all National Treasure-grade and Important Cultural Property-grade armor in the entire country. You can see the actual breastplates worn by legendary figures like Minamoto no Yoritomo, the first shogun of the Kamakura period. The museum also features the only known female suit of samurai armor, worn by the “Joan of Arc of Japan,” Tsuruhime, who fought to protect the island from invaders.

3. The Omishima Cycling Loop: A Route for Every Level

The Omishima cycling experience can be divided into two main options: the “Main Route” and the “Perimeter Loop.”

The Main Route (The Blue Line)

This is the standard path most cyclists follow. It enters the island from the Tatara Bridge and cuts across the center toward the village of Miura and Oyamazumi Shrine. This route is roughly 5-7 kilometers one way and is relatively flat, making it accessible for families and casual riders. It passes through the **Tatara Shimanami Park**, a “michi-no-eki” (roadside station) that offers great views of the bridge and the famous “Cyclist Sanctuary” monument.

The Perimeter Loop (The Outer Circle)

For those seeking a challenge and a more intimate look at the island, the 40-kilometer perimeter loop is the way to go. This route takes you away from the crowds and follows the coastline. Be prepared: while the views of the turquoise Seto Inland Sea are breathtaking, the western and northern coasts of Omishima are mountainous. You will encounter several steep climbs and descents.

The reward for this effort is solitude. You will pass through tiny hamlets where citrus fruit hangs heavy over the road and hidden coves where the water is crystal clear. The western side of the island is particularly famous for its sunsets, which are considered some of the best in the Setouchi region. If you choose the perimeter loop, ensure you have an e-bike or are in good physical condition, as the elevation changes are significant.

4. Art and Architecture Along the Coast

One of the most surprising aspects of Omishima is its collection of world-class art and avant-garde architecture. As you cycle the western coast, you will encounter a series of museums that seem to emerge from the hillsides like sculptures themselves.

**Toyo Ito Museum of Architecture:** Designed by the Pritzker Prize-winning architect Toyo Ito, this museum consists of two buildings: the “Steel Hut,” a bold, geometric structure that looks like a futuristic ship, and the “Silver Hut,” a recreation of Ito’s own former residence. The museum explores the relationship between architecture and the natural environment of the island.

**Tokoro Museum of Art:** Located high on a cliffside, this small but impactful museum features contemporary sculptures. The open-air terrace offers a panoramic view of the islands scattered across the sea, blending the art perfectly with the landscape.

**Ken Iwata Mother and Child Museum:** This is an open-air circular gallery that houses sculptures by Ken Iwata. The lack of a roof allows the changing light and weather of Omishima to become part of the viewing experience.

Cycling between these sites provides a cultural rhythm to your ride, offering a sophisticated contrast to the ancient atmosphere of Oyamazumi Shrine.

5. Local Flavors: Citrus, Seafood, and Salt

Cycling creates a serious appetite, and Omishima is ready to satisfy it with some of the freshest ingredients in Japan. The island is part of the “Citrus Kingdom” of Ehime. Depending on the season, you can find dozens of varieties of oranges, lemons, and limes. Keep an eye out for **Harehime** or **Dekopon** oranges, known for their incredible sweetness. Many local stalls operate on an honor system—just drop a few hundred yen in the box and take a bag of sun-ripened fruit.

For lunch, the area around Oyamazumi Shrine has several excellent options. The local specialty is **Kaisen-don** (seafood bowls). Given the fast-moving currents of the Kurushima Strait, the fish here—particularly the sea bream (*tai*)—is firm and flavorful. **Ohishige** is a popular local spot near the shrine entrance known for its generous portions of fresh sashimi over rice.

Don’t forget to try the local salt-flavored treats. The neighboring island of Hakatajima is famous for salt production, and you will find “Salt Soft Serve” ice cream at many stops on Omishima. The hint of salt enhances the creaminess of the dairy and provides a much-needed electrolyte boost for your ride. For a coffee break, look for **Limone**, a small shop specializing in organic limoncello and lemon cakes made from Omishima-grown fruit.

6. Practical Tips for Your Omishima Adventure

To make the most of your trip, a little bit of logistical planning goes a long way.

**Bike Choice:** If you plan to do the full 40km perimeter loop, strongly consider renting an **E-bike (Electric Assist)**. The Shimanami Kaido rental system has various terminals where you can pick up and drop off bikes. E-bikes make the steep climbs on the western side of Omishima manageable for almost anyone.

**Luggage:** If you are cycling the whole Shimanami Kaido, don’t carry your heavy bags. Use the **Sagawa Express “Hands-Free Cycling”** service. You can drop your luggage at your hotel in Onomichi in the morning, and it will be waiting for you at your accommodation on Omishima or Imabari by evening.

**Timing:** Oyamazumi Shrine and the museums generally close by 5:00 PM. Start your day early (around 8:00 or 9:00 AM) to ensure you have enough time to explore the shrine, visit at least one museum, and complete your ride before sunset.

**Hydration and Sun:** The Setouchi sun can be intense, especially with the reflection off the water. Wear sunscreen and keep a bottle of water handy. There are plenty of vending machines throughout the island, but they become rarer on the remote northern coast.

**Check the Calendar:** Most museums on the island are closed on Mondays (or Tuesday if Monday is a national holiday). Oyamazumi Shrine is open year-round.

FAQ: Omishima Travel Questions

1. Can I visit Omishima as a day trip from Onomichi?

Yes, it is possible but requires a focused itinerary. Taking a bus or ferry to Omishima in the morning, renting a bike on the island to do the loop and visit the shrine, and returning by bus/ferry in the evening is a great way to see the highlights without cycling the entire 70km Shimanami Kaido.

2. How difficult is the cycling loop for beginners?

The main “Blue Line” route to the shrine is very easy and mostly flat. However, the full perimeter loop around the island is considered “intermediate” due to several steep hills. Beginners should definitely use an electric-assist bike for the full loop.

3. What is the best time of year to visit?

Spring (late March to May) and Autumn (October to November) are ideal. The weather is mild, and the scenery is beautiful. In spring, you’ll see cherry blossoms; in autumn, the citrus trees are heavy with bright orange fruit. Summer can be very hot and humid, while winter is often sunny but chilly.

4. Is there an entrance fee for Oyamazumi Shrine and the museums?

Entry to the main Oyamazumi Shrine grounds is free. However, the Shimanami Treasury (Museum of Armor and Swords) requires a paid ticket (approx. 1,000 yen). The art museums like the Toyo Ito Museum also require separate admission fees, typically ranging from 500 to 1,000 yen.

5. Are there places to stay on Omishima?

Absolutely. Omishima has a range of accommodations, from traditional *ryokans* and guest houses (*minshuku*) to the unique **WAKKA**, which is a dedicated cyclist-friendly resort offering glamping, sea views, and specialized support for riders.

Conclusion: Planning Your Perfect Omishima Escape

Omishima is more than just a waypoint on the Shimanami Kaido; it is a destination that captures the soul of the Seto Inland Sea. By combining the physical thrill of the cycling loop with the spiritual weight of Oyamazumi Shrine, you create a travel experience that balances body and mind.

When planning your trip, remember that the “Omishima experience” is best enjoyed slowly. Don’t just race to the next bridge. Stop to smell the lemon blossoms, sit on a sea wall in a quiet fishing village, and take the time to stand in awe before the ancient camphor trees. Whether you are marvelling at thousand-year-old samurai swords or modern architectural wonders, Omishima reminds us that history and innovation can live side-by-side in perfect harmony. Pack your helmet, bring your camera, and prepare for a journey into the “Island of Gods”—it is a ride you will never forget.