Yasaka Otaki Waterfall is a spectacular 50-meter waterfall in the Yasaka area of Omachi City, Nagano Prefecture. Surrounded by mountains and forests, it has long been cherished by local residents for its impressive scale and natural beauty.
The waterfall is also known as a “Urami no Taki,” or “waterfall viewed from behind.” Its most unusual feature is that visitors can walk behind the falling water and look outward through the curtain of water. This rare perspective creates an unforgettable experience, as the rushing waterfall can be viewed from inside the rock formation itself.
The scenery changes with the seasons, from fresh green forests in spring and summer to brilliant autumn foliage and a spectacular frozen waterfall in winter.
Yasaka Otaki drops approximately 50 meters from a rocky cliff along Sakunodaira-sawa. Its water originates on Mount Shiroyama, which rises to 952.1 meters, before flowing through a narrow section carved into a massive rock formation.
The water gathers into a single powerful stream before continuing toward the Kanakuma River. The combination of tremendous force and delicate strands of falling water gives the waterfall an almost sculptural quality.
The beauty of Yasaka Otaki was already recorded in the Nagano Prefecture Town and Village Gazetteer, compiled in 1936. The falling water was compared to delicate threads of silver, while the rock walls on either side were described as resembling intricate carved baskets.
Its majestic appearance was said to make travelers stop in their tracks as they passed by. Even today, the waterfall retains the sense of drama that has attracted visitors for generations.
When temperatures drop during the severe Nagano winter, Yasaka Otaki can transform into a spectacular icefall. Icicles rising from the base of the waterfall can reach approximately 30 meters in height.
The frozen water takes on a pale blue-white appearance, creating an otherworldly landscape in the quiet winter forest. The contrast between the solid ice and the surrounding snow makes the waterfall particularly popular with photographers.
In the deep winter silence, even the subtle creaking of the ice can add to the atmosphere. The frozen waterfall offers a completely different experience from the rushing waters seen during the warmer months.
Yasaka Otaki is also connected to local religious traditions. A small shrine stands near the waterfall and enshrines Kobo Daishi, the revered Buddhist monk traditionally regarded as the founder of Shingon Buddhism in Japan.
Locally known as the “Otaki Kobo-sama,” the small sanctuary has long been respected as a place of worship. The combination of the immense natural waterfall and the quiet sacred space creates a peaceful atmosphere where visitors can pause and appreciate the spiritual character of the area.
During spring and summer, fresh green foliage surrounds the waterfall, while abundant water creates a powerful flow down the cliff. The cool mountain environment makes the area an appealing place to escape the heat of summer.
In autumn, the forest surrounding the waterfall changes into shades of red, orange, and gold. The colorful leaves contrast beautifully with the white stream of falling water and dark rock walls, creating an especially photogenic scene.
Winter brings the most dramatic transformation. As the waterfall freezes, the familiar flowing water becomes a towering formation of ice. The pale blue surface and snow-covered forest create a serene landscape unlike anything seen during the other seasons.
Yasaka Otaki can be reached in approximately 45 minutes by car from the Azumino Interchange on the Nagano Expressway. From the Omi Interchange, the drive takes approximately 25 minutes.
Parking is available near the waterfall, making it relatively convenient to include Yasaka Otaki in a sightseeing trip around Omachi and the surrounding mountain areas.
From Shinano-Omachi Station on the JR Oito Line, a taxi ride takes approximately 20 minutes.
Visitors can also use the Omachi City Fureai Bus Yasaka Route. Board at the Shinano-Omachi Station bus stop and get off at the Komatsuo bus stop, from where the waterfall can be reached on foot.
Yasaka Otaki Waterfall offers something rare: the opportunity to experience a waterfall from behind the falling water. Standing within the rocky surroundings and looking outward through the rushing stream gives visitors a perspective that is difficult to find at ordinary waterfalls.
Its 50-meter drop, dramatic rock formations, changing seasonal scenery, and winter icefall make it a memorable natural attraction in Omachi. At the same time, the small sanctuary dedicated to Kobo Daishi reveals the area’s long connection with local faith and tradition.
For travelers exploring the mountains of Nagano, Yasaka Otaki is a place where water, rock, forest, winter ice, and local spirituality come together. A visit in a different season can reveal an entirely new face of this remarkable waterfall.