Journey to Tsūjun Bridge: A Story of Craftsmanship and Spirit Bound by Stone

Introduction

In the mountainous town of Yamato in Kumamoto Prefecture, a quiet stone bridge stands, as if transcending time.
Its name is Tsūjun Bridge. Built in the final years of the Edo period, this historic structure is far more than just stone and mortar.

It embodies the wisdom of a rural community, the innovation of agricultural engineering, and the enduring spirit of resilience. Even today, it continues to move travelers with its quiet strength and timeless elegance.
As a “rainbow bridge” that nourishes both land and heart, Tsūjun Bridge is etched with stories and shaped by human ingenuity. For seasoned travelers, it offers an unforgettable encounter with the very soul of Japan.

Wisdom and Dedication of the Pioneers

Completed in 1854 (Kaei 7), Tsūjun Bridge was not built for beauty or military defense. It was constructed using the most advanced techniques of the Edo period to fulfill a critical purpose: transporting agricultural water to the Shiraito Plateau, an area with scarce natural springs.

Surrounded by deep ravines carved by rivers, the plateau needed a bold solution to bring water across the valley.
Under the leadership of Yasunosuke Futa, a visionary local administrator (Sōjōya), the community came together to build what would become the largest stone-arched aqueduct of the premodern era in Japan — a marvel born from necessity and collective effort.

The Rainbow Arc: Water in Flight

The brilliance of Tsūjun Bridge lies not only in its construction, but in the breathtaking spectacle it creates.
The bridge discharges water in a sweeping arc that soars into the sky — a bold display of creativity and precision.

Travelers from around the world come to witness this powerful stream of water, launched from a masterpiece of ingenuity.
At times, a rainbow appears within the mist — a fleeting yet unforgettable moment of natural beauty that leaves all who see it in awe.

From Disaster to Determination

In 2016, Tsūjun Bridge sustained damage from the Kumamoto Earthquake. Then, in 2018, torrential rains caused part of its stone embankment to collapse.

Yet, true to its origins, the bridge once again became a symbol of unity.
Engineers and skilled craftsmen came together with unwavering commitment to restore it.
After years of dedicated preservation efforts, Tsūjun Bridge triumphantly returned in 2020 — regaining both its magnificent form and the dramatic water discharge that defines its legacy.

The Dignity of Tsūjun Bridge

Today, Tsūjun Bridge welcomes visitors with a landscape steeped in quiet dignity and pride.
You can stroll the peaceful paths nearby, visit the museum that preserves its legacy, and savor local cuisine rooted in the region’s traditions.

This is not merely a historic site — it is a place where civil engineering and nature exist in profound harmony.
As an active aqueduct, Tsūjun Bridge continues to serve, quietly bearing the hopes, ingenuity, and traditions of those who built and maintain it.
It stands without words, yet its commanding presence speaks volumes — a living structure that has protected and sustained lives across generations.

Conclusion

Tsūjun Bridge is far more than just a stone bridge.
Where the Shiraito Plateau once struggled for water, terraced rice fields now unfold in abundance. This landscape was made possible by the Tsūjun Aqueduct system and continues to be maintained through the ongoing agricultural efforts and water management of local farmers.

For travelers who seek not only beauty but depth — who wish to understand the soul of a place — this National Treasure of Kumamoto offers an experience truly worth the journey.