For a day by the water with a difference, plan an excursion to the bubbling pools of Inubosaki Hotel Hot Spring. This spot is famous for its mineral-rich waters.
When you've finished at this Choshi naturally heated water source, why not make your way to Cape Inubozaki, Inubozaki Lighthouse, and Hasaki Beach? They're not far from Inubosaki Hotel Hot Spring and also popular with travelers.