Tenga Falls (天河滝) is one of Tadachi Waterfalls located in Nagiso, Nagano.
It is the biggest and major waterfalls of Tadachi. Its height is about 40m. Tadachi Falls is one of the 100 best Japanese waterfalls. Rasen literary means spiral. So, it has a spiral shape.

Tourist Info.
There is parking and restroom at parking.
Admission: 200 yen.
Hiking takes 3 hours. Requires nice shoes for hiking.

Access
0. at Nagiso Station.
1. use JR Chuo Line to Tadachi (10 min.)
2. take a taxi to its parking (20 min.)