Senami View Hotel

The indoor bath here is real hot-spring water, piped in daily from the hotel's sister bathhouse, Yumoto Ryusen (湯元龍泉), a short drive down the coast; the spring runs very hot, so it's diluted before it reaches the tubs. The open-air rotenburo next to it faces straight out over the Sea of Japan and is genuinely good for sunsets, but by the hotel's own account it's not onsen water, just a plain hot bath with the view (it closes when the sea wind picks up). There's no private bath on site, though guests get a discount ticket for Ryusen's baths instead. Every room looks out over the water too, and this stretch of Senami's coast is known locally for its sunsets.