For a day by the water with a difference, plan an excursion to the bubbling pools of Yumeikan. This spot is famous for its mineral-rich thermal waters.
This Kurayoshi naturally heated water source is an interesting spot to begin your day of sightseeing. There's plenty to see nearby, such as Utsubuki Park, Akagawara, and Daigakuin Temple. Wander around at your leisure at Yumeikan before making tracks to these other fine sights.