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Chubu-Sangaku NP, Nagano
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Three separate streams make Sanbondaki’s side-by-side falls: the center is the main river, the right glides over black lava from Kuroi-sawa, and the quiet left comes from an unnamed stream. Each drops 50–60 m.
Eruptions from Mt. Norikura sent lava down its eastern flank, filling deep valleys and building the plateau. Sanbondaki drops 50–60 m from one of the steep ledges left at the lava flow’s edge.
Local records remember Sanbondaki as a training ground for ascetics of Norikura’s mountain faith: practitioners entered the mountains to worship the falls and carry out their spiritual practice here.
Sanbondaki was designated a Nagano Prefecture Place of Scenic Beauty in 1981 and selected for Japan’s Top 100 Waterfalls in 1990. The three cascades count together as one entry—not three.
Morning sunlight through the spray can create rainbows at Sanbondaki. In winter, all three falls can freeze solid, transforming the lively cascades into striking icefalls.
Around the falls, red and gold katsura, birch and rowan leaves flare against evergreen fir and hemlock. This colorful mix of deciduous trees and subalpine forest frames Sanbondaki’s cascades.
