Where the Light of the Seto Inland Sea Meets Ancient Healing Waters: A Mindful Retreat Through Ehime

 

Ehime Prefecture — the heart of Shikoku, where the gentle light of the Seto Inland Sea meets thermal springs boasting three thousand years of history.

Celebrated throughout Japan as "Mikan (Mandarin Orange) Prefecture," this land holds within it a world-class panoramic view of straits and bridges, a celebrated castle counted among Japan's twelve remaining original keeps, a mysterious natural cold-air cave born from the ancient earth, and a legendary hot spring that represents the very origin of Japanese onsen culture.

A journey to Ehime is an experience as gentle and endless as the sea breeze of the Seto Inland Sea mixed with the fragrance of citrus — and yet one that leaves a deep impression on the heart. 

Guided by data and refined by Zen, we present the ultimate Ehime retreat, bathed in the light of the Seto Inland Sea.

■ 1. A View of Straits and Bridges That Takes the World's Breath Away: "Kirozan Observatory Park"

"Kirozan Observatory Park" sits at the summit of Mt. Kirozan (307.8 meters) at the southern tip of Oshima Island in Imabari City. 

From an observatory designed by world-renowned architect Tadao Ando, it offers a panoramic view of the Kurushima Kaikyo Bridge and the Shimanami Kaido — the foremost scenic viewpoint in all of Shikoku.

Spreading across your field of vision from the observatory are the silhouettes of countless islands floating on the Seto Inland Sea, the graceful arches of the Kurushima Kaikyo Bridge threading between them, and the gentle blue of the sea stretching all the way to the horizon. 

The 360-degree panoramic view — on clear days extending as far as the mountains of Honshu — is celebrated by travelers from Japan and around the world as "the most beautiful viewpoint in the Seto Inland Sea."

The view at dusk is particularly overwhelming. The moment the setting sun dyes the Seto Inland Sea crimson and the silhouette of the Kurushima Kaikyo Bridge rises against the golden light is a beauty that seems to transcend this world. 

Zen禅View strongly recommends timing your visit to the observatory with the moment of sunset.

The observatory structure itself — designed by Tadao Ando — is also a highlight. The concrete structure, designed to blend seamlessly into the mountain's topography, orchestrates the approach to the observation deck as an "architectural experience" in its own right, maximizing the sense of liberation the moment you reach the summit.

Located along the cycling route of the Shimanami Kaido, this viewpoint is also extremely popular among cyclists who visit by bicycle.

■ 2. A Valiant Original Keep Soaring Into the Sky: "Matsuyama Castle"

"Matsuyama Castle (Matsuyama-jo)" soars above the center of Matsuyama City, the prefectural capital of Ehime Prefecture. As one of twelve castles in Japan retaining their original keep, it commands overwhelming support from castle enthusiasts across the country.

Built on the summit of Mt. Katsuyama at 132 meters above sea level, the view from Matsuyama Castle's keep is also breathtaking. The sweeping open panorama — looking out over the cityscape of Matsuyama and beyond to the islands of the Seto Inland Sea — allows visitors to experience the perspective of the lords who once governed this land.

Construction began in 1602 CE (Keicho 7) under Kato Yoshiaki, and the castle was completed over approximately 26 years, surviving multiple lightning strikes and fires to preserve its keep through to the present day. The weight of that history is inscribed in every stone of the walls and every beam of the keep.

In spring, approximately 200 cherry trees in the castle park reach full bloom, and the stunning beauty created by the keep and cherry blossoms in concert draws many visitors each year as one of Ehime's most celebrated hanami (flower viewing) spots.

Accessible to the summit by ropeway or chairlift, even those without full physical confidence can reach the keep with ease. We recommend combining your visit with a leisurely stroll through the streets of Matsuyama City to enjoy a full day in Matsuyama.

■ 3. Ancient Cold Air Exhaled by the Earth: "Kazaana (Wind Cave)"

"Kazaana (Wind Cave)" is located at the foot of Mt. Ishizuchi in Saijo City — a mysterious natural cold-air spot where cold air streams year-round from fissures in the rock.

Cold air of around 10°C flows ceaselessly from between the rocks even in summer. This place was once used by local people as a sericulture (silkworm farming) facility and for storing agricultural produce — a spot where the wisdom of lived life still breathes.

Mt. Ishizuchi, standing at 1,982 meters as the highest peak in western Japan, has been revered since ancient times as a sacred mountain of mountain asceticism (Shugendo), visited by many practitioners. 

The cold air welling up from its foothills brings a mystical experience — as if the earth itself is breathing deeply.

In the heat of midsummer, the exhilaration of being enveloped by cool air as you approach the wind cave is a pure and primal "gift of nature" that no other tourist site can offer. 

Putting down your smartphone and simply surrendering your body to the cold air of the earth is the finest mindfulness experience imaginable.

Combining your visit with a hike up Mt. Ishizuchi or trekking through the surrounding mountain streams creates a journey that immerses you even more deeply in the great nature of Ehime. 

Where the sacred energy of Shikoku's highest peak meets the cold wind — this is Ehime's finest "sanctuary for digital detox," resetting the hearts of all who visit.

■ 4. A Sacred Sanctuary of Hot Springs, Transcending Three Thousand Years: "Dogo Onsen Honkan"

"Dogo Onsen" is known as one of Japan's oldest hot spring resorts, with a history ancient enough to be recorded in the Nihon Shoki (Chronicles of Japan). 

At its heart stands "Dogo Onsen Honkan" — a three-story wooden structure built in 1894 CE (Meiji 27), designated as a National Important Cultural Property and a truly one-of-a-kind facility that symbolizes Japanese onsen culture.

Said to be one of the inspirations for the "Aburaya" bathhouse in Studio Ghibli director Hayao Miyazaki's animated film "Spirited Away," this building's beautiful Japanese architectural aesthetic — harmonizing reddish roof tiles with white walls — is illuminated at night, presenting a fantastical expression entirely different from its daytime appearance.

The spring water at Dogo Onsen is a simple alkaline spring, gentle on the skin and celebrated as "bijin no yu" (the spring of beauty). 

Soaking in the bathhouse of this historic wooden building while feeling the full-body passage of time from the Meiji era through to the present is a "meditation of the bath" that touches the very essence of Japanese onsen culture.

Around the main building, the arcade shopping street "Dogo Haikalra-dori" running from Dogo Onsen Station is lively with shops selling Ehime citrus sweets, local sake, lucky charms and souvenirs — enriching all aspects of the journey.

The time spent strolling through the shopping street in a yukata (casual kimono) after soaking in the springs is a blissful moment that allows you to completely forget the rush of daily life. 

Dogo Onsen leaves a warm afterglow in the hearts of all who visit — the perfect "closing chapter" of a journey to Ehime.

■ Column: Setoka — The King of Citrus, Ehime's Pride

No conversation about a journey to Ehime is complete without mentioning "Setoka." Born from the crossbreeding of three varieties — Kiyomi, Encore, and Murcott — this citrus fruit is Ehime's pride: a branded mandarin orange so intensely sweet and meltingly tender that it has been called "the otoro (premium tuna) of citrus."

With a sugar content exceeding 12–13 degrees, thin skin that peels easily, and few seeds, a single bite releases an opulent fragrance and a flood of juice that melts in the mouth — a "premium experience" unlike any other citrus.

The season runs only from late January to mid-March, making it a "once-in-a-season encounter" impossible to experience outside this window. 

When visiting Ehime, we strongly recommend picking up a setoka at a local farmers' market or roadside station and tasting it with the freshness that only the place of origin can offer.

Grown in the warm climate of the Seto Inland Sea, basking fully in rich sunlight, setoka is a "work of culinary art" born from Ehime's land. 

A single setoka tasted in the place where it was grown is the finest mindful food experience — allowing you to feel the local climate and terroir directly on your tongue.

■ Conclusion: Ehime — A Land of Heartfelt Richness, Nurtured by the Light of the Seto Inland Sea and the Springs of Shikoku

A world-class view of straits and bridges. A valiant historic castle soaring into the sky. Ancient cold air exhaled by the earth. 

A sacred hot spring sanctuary spanning three thousand years of history. And the supreme sweetness born from the king of citrus.

A journey to Ehime Prefecture is a rare and continuous series of experiences where all five senses are simultaneously fulfilled in the gentle light of the Seto Inland Sea.

For your next journey, choose Ehime — selected by data, refined by Zen. 

In the sea breeze of the Seto Inland Sea and the waters of Dogo, experience the retreat that helps you reclaim your true self — on your own two feet.

♨️ Explore Ehime's Curated Spots

▶ Zen禅View Local Finder｜Ehime Prefecture