Iwamatsu Ryokan
Along the Hirose River, this large ryokan has rooms that peer out over the stream and mountains, offering a 20-meter pool, table tennis, and a children's play area, as well as its original rotenburo. Some of it is a bit over the top, but that is the mood. Nevertheless, the reason to stay here is for the onsen. Although the rotenburo generally offers mixed-sex bathing, some hours are reserved for women only. Five different springs fill the four rocky baths, and you can see the warm water bubbling up from the bottom of the river while you’re soaking. Request a room with beds if you’re not interested in sleeping on futons. Some rooms even have private baths with views.
