No mixed bath.
Open: 12:00-22:00 (weekdays, Last admission time 21:00),
12:00-21:00 (weekends&public holidays)
Closed: every Wed(except Public Holidays).
You can hire a towel from them with a little cost.
FREE to use shampoo&conditioner, body soap and hair dryer.
Price: 700yen/person *CAUTION* If you took or take train from Amanohashidate station, when you buying train ticket(or way out from platform), you can ask for discount coupon. With this coupon 700yen→600yen.
Also combination ticket is available(Hot spring&Amanohashidate view land) , please see the detail here!
Entrance
Lobby
Pictures from http://travel.biglobe.ne.jp/onsen/spot/26010930.html