This hot spring is at Yuze spa village where is surrounded by beautiful mountains and Yoneshiro river, and good to access for Hachimantai sightseeing spot.
It is an inn and opened to day use too.
(In the bath taking picture is not permitted so this is from official web site)
Onsen ryokan inn “Nagominoyado Himenoyu” (http://sanrok-himenoyu.com/)
【Address】40-1, Yuze, Hachimantai, Kazuno-shi, Akita-ken, Japan
The information is as of March 26th 2017.