Hiking paths get crowded during the tourist season, but these waterfalls make a good afternoon excursion in the off-season. To get to the trailhead at Mine-no-Chaya, take the bus from Naka-Karuizawa. The ride takes about 25 minutes. From the trailhead it's about a 1½-km (1-mile) hike to Shiraito. The trail then swings southeast, and 3 km (2 miles) farther are the Ryugaeshi Falls. For a longer hike, walk back to town via Mikasa village. It takes about an hour and 15 minutes.
Or catch the bus bound for Karuizawa (10 minutes) from the parking lot.
Shiraito-no-taki, Karuizawa, Japan