This shiny white, semi-cylindrical, beachfront tower with glass elevators has ocean-view rooms and onsen above the treetops (day use ¥1050). Low-season rates are surprisingly reasonable for the quality; peak-season prices can rise by ¥5000 or more. There's a large fountain and pool (open mid-July to August), a gym, multiple restaurants, and some children's attractions; the beach couldn't be closer.
Nearly all the 200-plus rooms have ocean views, but a few do not. Those may be cheaper, so it's worth asking if you're trying to stretch the yen.