Guida
Sukkanzawa Valley is located in the Yumoto Shiobara area of Nasushiobara City, Tochigi Prefecture. The most striking feature of this location is the unique nature of its water, which originates from the caldera of Mount Takahara. The water contains high levels of volcanic components such as minerals and carbonates, which causes the water to appear a distinctive pale blue in certain areas. This unique characteristic led to the name 'Sukkarai-zawa' (meaning 'sour and spicy valley') in the past, which eventually evolved into the current name, 'Sukkanzawa.'
The name Sukkanzawa is deeply connected to the volcanic history of the region. Since the source of the water is the caldera of Mount Takahara, the stream is rich in volcanic minerals. Historically, the water was said to have a unique taste—described as sour or pungent—which gave rise to the name 'Sukkarai-zawa.' Over time, this name transitioned into the modern 'Sukkanzawa.' This site is a place where the local natural environment and volcanic history are intimately intertwined.
Within the valley lies the 'Yuhi Falls,' surrounded by nearly vertical cliffs. The waterfall has a drop of approximately 10 meters and is structured by high walls on three sides. At certain times, light rays (crepuscular rays) can be seen piercing through to the basin below, creating a breathtaking contrast between the black rock walls, the white rushing water, and the pale blue hue of the stream. The route involves navigating through rocky terrain and passing under the waterfall, allowing visitors to observe the raw geological formations closely.
Access to the valley via Prefectural Road 56 (Shiobara-Yaita Line) is closed during the winter season, making visits impossible in winter. The best time to visit is from May to September, when the snow has melted and the water flow is stable. During bright daylight hours, you may witness beautiful light effects hitting the waterfall basin, though the scenery changes significantly depending on the weather and the angle of the sun.
Visitors can enjoy trekking through the natural terrain. However, please note that some sections of the walking paths have been lost due to erosion, and certain routes are currently closed. To reach Yuhi Falls, you may need to follow a stream bed for about 100 meters without clear signage. The experience is centered on observing the waterfall and the valley's landscape while directly interacting with the natural topography.
There are several other natural attractions near Sukkanzawa. For instance, the famous 'Oshiraji Falls' is located just a few minutes away by car. The Shiobara Onsen area is also nearby, and you can easily travel from the Shiobara Onsen Visitor Center by car to explore the rich natural beauty of the Nasushiobara region.
When exploring Sukkanzawa, please observe the following guidelines: