Picked this onsen hotel as it has rooms in modern style and a balcony with seaview. Though there was a tub, it’s not using onsen but only hot water as stated on its website (in Japanese), so we did not even bother. The public rotenburo was spacious, sea-facing and very nice, though it took a bit of walk downhill.
Kaiseki dinner was nice though whale in sashimi (“Kujira”) was served, as in most other ryokans in southern Wakayama. We deliberately did NOT touch it at all.