Sacred Pilgrimage Roads and Highway Deities: The Gods Who Guard Japan's Ancient Routes

The Birth of Pilgrimage Roads and Their Mythological Origins

The history of Japan's pilgrimage roads reaches back to the age of mythology itself. The Kojiki and Nihon Shoki record the story of Emperor Jimmu's Eastern Expedition, in which he journeyed from the land of Hyuga toward Yamato. This expedition route later became the prototype for pilgrimage roads crossing the Kii Peninsula. The mountain paths of Kumano, where the three-legged crow Yatagarasu is said to have guided the emperor, were eventually developed into the Kumano Kodo and became a celebrated pilgrimage route to the sacred land of rebirth.

During the Heian period, pilgrimages to the three great Kumano shrines — Kumano Hongu Taisha, Kumano Hayatama Taisha, and Kumano Nachi Taisha — exploded in popularity. Retired Emperor Go-Shirakawa is recorded to have made the Kumano pilgrimage 34 times in his lifetime, and the phenomenon became so widespread it was called the Ant Procession to Kumano, with people of every social class from emperors to commoners walking these paths. The Kumano Kodo comprises five distinct routes — Nakahechi, Ohechi, Kohechi, Iseji, and Kiiji — each imbued with its own unique faith and local character. In 2004, these paths were inscribed as a UNESCO World Heritage Site under the title Sacred Sites and Pilgrimage Routes in the Kii Mountain Range, drawing international attention as one of the rare cases where a road itself received World Heritage status.

The pilgrimage road to Ise Grand Shrine stands as another iconic sacred route. During the Edo period, Oisemairi pilgrimages became enormously popular among commoners. The mass pilgrimages known as Okagemairi were particularly extraordinary: records from 1830 indicate that approximately five million people headed to Ise in a single year. Considering Japan's population was roughly 30 million at the time, this means approximately one in six people visited Ise. Thriving gate-front towns like Okage Yokocho developed along the pilgrimage road, lined with inns, tea houses, and souvenir shops that formed vital foundations of the regional economy.

Dosojin and the Faith of Boundaries Along the Highways

A rich variety of deities were enshrined along Japan's highways to protect travelers, and none were more familiar than the Dosojin, or roadside guardian deities. Dosojin were placed at village entrances and crossroads, functioning as boundary guardians that warded off evil spirits and epidemics from entering communities. In the city of Azumino in Nagano Prefecture, approximately 400 Dosojin statues survive to this day, and the paired male-female Dosojin figures are beloved as symbols of romantic bonds and marital harmony.

The origins of Dosojin are traced to Sarutahiko no Mikoto, who appears in the Kojiki. Sarutahiko was the earthly deity who guided Ninigi no Mikoto during the Descent of the Heavenly Grandchild, and as the god who opens the way, he was enshrined along highways throughout the nation. Sarutahiko Shrine in Ise is considered the head shrine, and even today it draws an unending stream of worshippers praying for success in new ventures and safe travels.

Mountain deity shrines were built at mountain passes, where travelers would press their palms together in prayer before attempting the crossing. Hakone Gongen, located near the famous checkpoint on the Tokaido highway, was revered by samurai and merchants as the guardian deity of one of the road's most treacherous stretches. Alongside the ichiri-zuka milestone markers set at intervals of approximately four kilometers, Jizo bodhisattva and Bato Kannon statues were installed, serving both as wayfinding aids and as memorial sites for travelers who had perished along the road.

The Five Highways and the Faith Culture of Post Towns

The five major highways established by the Edo shogunate — the Tokaido, Nakasendo, Nikko Kaido, Oshu Kaido, and Koshu Kaido — represent the culmination of Japan's highway culture. The Tokaido, the trunk road linking Edo and Kyoto across approximately 492 kilometers, was punctuated by 53 post towns. The landscapes depicted in Utagawa Hiroshige's ukiyo-e series The Fifty-Three Stations of the Tokaido convey the distinctive character and faith of each station to this day.

Each post town established branch shrines of Akiba Shrine or Atago Shrine, dedicated to the fire-prevention deity. In post towns densely packed with wooden buildings, fire was the greatest threat, and devotion to Akiba Daigongen was inseparable from highway culture. Akibasan Hongu Akiba Shrine in Shizuoka Prefecture is the head shrine of approximately 800 Akiba shrines nationwide, and the Akiba lanterns dotting the highways served simultaneously as waymarkers for travelers and symbols of prayers against fire.

The Nakasendo, the inland alternative to the Tokaido, threaded through the Kiso Valley with 69 post towns along its length. Tsumago-juku and Magome-juku preserve the atmosphere of their heyday, revealing how shrines and temples along the highway served as the spiritual centers of their communities. Suwa Taisha, a major sacred site along the Nakasendo, embodies the fusion of highway culture and mountain worship through its Onbashira Festival, a magnificent ceremony held once every six years (every seventh year by traditional count) in which enormous wooden pillars are hauled down from the mountains to the village.

Pilgrimage as Walking Meditation and Its Scientific Benefits

Walking Japan's pilgrimage roads was never merely a means of transportation — it held deep significance as a form of moving spiritual practice. The Shikoku Pilgrimage to the 88 Sacred Temples covers approximately 1,200 kilometers and takes 40 to 60 days on foot. The phrase Dogyo Ninin, meaning traveling together as two, expresses the pilgrim's faith in walking always in the company of Kobo Daishi Kukai. The pilgrim's white garment and diamond staff signify a person who has stepped outside the secular world, and the custom of osettai, in which roadside residents offer food and lodging free of charge, continues to this day.

Modern research confirms that such long-distance walking confers substantial benefits on body and mind. A 2014 Stanford University study demonstrated that walking increases creative thinking by an average of 60 percent. Research from Chiba University has shown that walking in natural environments reduces cortisol, the stress hormone, by 16 percent and suppresses overactivity in the prefrontal cortex. The spiritual peace that ancient pilgrims found through walking is entirely explicable from the perspective of modern science.

Furthermore, research from Kyoto University's Primate Research Institute indicates that rhythmic walking movement promotes serotonin secretion, reducing anxiety and depression. The deliberate act of placing each step on the stone pavements and mountain trails of pilgrimage roads corresponds directly to modern mindfulness walking, and its effects as walking meditation are now scientifically recognized.

Cultural Exchange and Economic Zones Connected by Roads

Pilgrimage roads and highways were arteries carrying culture and commerce as much as faith. Markets invariably sprang up at the junctions of Kitamaebune shipping ports and highway nodes, forming trading centers where regional specialties converged. Along the pilgrimage roads to Izumo Taisha, tamahagane steel produced by tatara smelting was distributed, supporting Japan's sword-forging culture. The Ise pilgrimage road gave birth to pilgrimage souvenirs exemplified by Akafuku mochi, establishing the origin of a local specialty culture that endures today.

Post towns along the highways buzzed with information exchange among travelers. Agricultural techniques, medical knowledge, and performing arts culture propagated through the highway network, driving both the homogenization and diversification of Japanese culture simultaneously. The haiku master Matsuo Basho's journey through the northeast and Hokuriku regions in The Narrow Road to the Deep North was an extension of this highway culture. Basho visited utamakura, famous poetic places along the highways, weaving local landscapes and human warmth into his haiku and thereby rediscovering the nation through literature.

The Oji shrines of the Kumano Kodo stand as iconic symbols of cultural exchange along pilgrimage roads. These small shrines dedicated to the child deities of Kumano Gongen numbered 99 along the Nakahechi route alone. Pilgrims visited each Oji shrine in succession as they made their way toward Kumano, and tea houses and rest stops established around each shrine became gathering places where local residents and pilgrims mingled and shared stories.

The Living Spirit of Pilgrimage Roads in the Modern Era

The faith woven into pilgrimage roads and highways continues to offer profound insights for contemporary life. The first act of ancient provincial governors and regional leaders was to build roads. Roads bring people together, people bring goods and information, and eventually culture blossoms. The Yamato court established official roads across the nation — the seven circuits of Tokaido, Tosando, Hokurikudo, San'indo, San'yodo, Nankaido, and Saikaido — precisely to unite the country under one vision.

In the modern era, pilgrimage walking is experiencing a remarkable revival. The Kumano Kodo receives approximately 300,000 pilgrims annually, with roughly 40 percent being international visitors. The Shikoku Pilgrimage has gained recognition as an international pilgrimage route and has established a sister-road partnership with Spain's Camino de Santiago. Modern walkers on these ancient paths, like their predecessors, use the act of walking to reflect upon themselves and draw fresh insights from encounters along the way.

The spirit of nation-building through roads carries a universal lesson that transcends time. Creating paths that connect people means building not only physical roads but also pathways of trust and dialogue. The ancient pilgrims who walked these sacred routes exchanged words with those they met, helped one another, and honored each other's beliefs. The history of Japan's highways and pilgrimage roads continues to teach us that the encounters and exchanges born from roads are the greatest force for enriching both nations and individual lives.