These falls are about an hour East of Nasushiobara in a town called Daigo. Its in Ibaraki prefecture.
These falls are quite famous due to the fact they freeze in winter and are very beautiful. Unfortunately, we went in late December and they weren't yet frozen. We'll go back early next year to view it frozen.
The drive to Daigo features really beautiful winter scenery. As you enter Daigo there are a lot of nice old Japanese buildings too.
The falls are a short walk from the parking area. You walk through a tunnel to get to the falls. There are some steep strenuous paths you can walk along with beautiful views.
There are quite a few well regarded onsens nearby. We recommend Sekisho open onsen for lunch and a soak.