The vast silver grass fields are manually maintained through controlled burning, known as 'yamayaki', held annually in the spring to promote healthy growth.
The area is an ancient volcanic site, forming the remnants of a caldera that dates back millions of years.
The susuki (silver grass) here is specifically managed to maintain the open, treeless plateau aesthetic that dates back to historical farming practices.
The site serves as a vital habitat for native highland flora that require high-sunlight, open-field environments.
Soni Highlands, known as Soni Kogen, is a expansive plateau covered in silver grass located in the volcanic landscape of Nara Prefecture. The area is defined by the slopes of Mt. Kuroso and the extinct caldera of Mt. Kame-yama. A well-maintained wooden walkway winds through the tall grass, stretching toward the mountain ridge. The plateau is part of the Muro-Akame-Aoyama Quasi-National Park. During autumn, the landscape turns a distinct golden-brown hue as the silver grass reaches maturity. The elevation provides panoramic views extending across the Kii Peninsula. Visitors can hike to the summit of Mt. Kame-yama for an unobstructed vantage point of the surrounding valley. The area remains a popular destination for hikers seeking high-altitude grassland scenery. The site is characterized by open terrain with minimal tree cover, offering exposure to the elements.
The mid-point of the trail ascending toward the summit of Mt. Kame-yama, looking back over the expanse of the silver grass.
Wear sturdy, closed-toe hiking shoes as the trail includes steep wooden stairs and uneven dirt paths.
Bring windbreakers or extra layers, as the high elevation and lack of cover make the plateau significantly colder and windier than the lowlands.
Pack sun protection, as there is virtually no shade along the primary walking trails.
Attempting the hike in rainy or high-wind conditions, as the exposed ridges become dangerous and the trail becomes slippery.
The annual yamayaki (controlled burning) event typically occurs in late winter or early spring, resulting in temporary trail closures.
Stay on the designated wooden pathways to protect the fragile grassland ecosystem; do not pick or damage the silver grass.
