Shiraito Waterfall (白糸の滝, Shiraito no Taki), measuring three meters high and 70 meters wide, is located in the forests north of downtown Karuizawa, Nagano, Japan. The mountain slopes above the waterfall contain a volcanic stratum on which groundwater flows before surfacing here. This explains why no river flows into the Shiraito Waterfall. Also, as only a small portion of the water flowing is rain water, the strength of the flow stays relatively constant independant of the weather.
Shiraito no Taki literally means “the waterfall of white threads”, which aptly describes its appearance, as multiple streaks of water drape over the surface forming what seems like a white curtain. The site is most beautiful in summer when the vegetation is lush; it is a somewhat popular destination for autumn colors around late October each year. Immediately below the Shiraito Waterfall is a secondary waterfall that is shaped such that water cascades over several steps.