For a day by the water with a difference, check out the steaming pools of Shiroyama Onsen. This spot is known for its mineral-rich thermal waters.
This naturally heated water source in Shibata is popular with fellow travelers, so leave a spot for it on your travel plans. Don't think the sightseeing ends there, however. There are many more places ready for you to experience after Shiroyama Onsen. Shibata Castle, Kikusui Sake Brewery, and Nikotan are close by.