Uonuma's Koshihikari Country and Kiyotsu Gorge Tunnel

The Uonuma region of Niigata Prefecture is where two of Japan's most celebrated natural phenomena converge: the world-famous Koshihikari rice fields and the breathtaking Kiyotsu Gorge. Together they offer a journey through landscapes of extraordinary richness — golden paddies stretching to mountain horizons, and a gorge carved deep through volcanic rock by centuries of river power.

Highlights

Uonuma Koshihikari is not merely Japan's most popular rice variety — it is widely considered the finest in the world, its reputation built on the region's deep winter snowmelt, fertile alluvial soil, and the dramatic temperature variations between mountain days and nights. Driving through the Uonuma basin in September, when the paddies ripen to gold beneath the surrounding peaks, is one of the quieter, more profound pleasures of traveling in Japan.

Kiyotsu Gorge Tunnel, easily accessible from the Tokamachi area of Uonuma, represents a remarkable melding of natural drama and contemporary art. The 750-meter tunnel cuts through the gorge's rock walls, opening at four dramatic viewing windows onto the turquoise river and towering stone cliffs below. Artists commissioned as part of the Echigo-Tsumari Art Field have transformed the tunnel into an immersive installation combining light, reflection, and the raw power of geological time.

The broader Echigo-Tsumari region, of which Uonuma is the heart, hosts the world's largest outdoor art festival on a triennial basis, scattering artworks across rice paddies, abandoned schools, and mountainside terraces.

Getting There & Tips

Base yourself at Echigo-Yuzawa or Tokamachi. A rental car is essential for exploring the rice country and gorge efficiently. The Hokuhoku Line connects Tokamachi to the Joetsu Shinkansen network.

Best Time to Visit

September for golden rice paddies. October for gorge foliage at its most vivid. Summer offers comfortable temperatures and full art field access.