For around 14000 yen per person, we had use of two separate baths (guests use privately in turn), a very nice seafood dinner, breakfast and transfers to and from the nearest station.
There are very nice views from the room out onto the ocean as well.
The outdoor bath (rotenburo) was very very nice and recommended, and the place is not too bad as far as value goes, although expensive compared to similar places I've stayed at in other parts of Japan.
Directions: Best to get them to pick you up from Ajiro station.
4-6 Sakimicho, Atami
627-763 Ajiro, Atami
7-39 Kasuga-cho, Atami
3-19 Higashikaigan-cho, Atami