Founded in 1915 at the northern shore of the lake, the secret Marukoma Onsen Ryokan (丸駒温泉旅館) has two pleasant open-air baths: super panoramic bath and calm rocky bath. Hot water quality is perfect.
It offers higaeri nyuyoku (day bathing; 日帰り入浴 11am-3.30pm; ¥1000) and lunch for nonguests. King of Sweden stayed here in 1990.
More info www.marukoma.co.jp
A free shuttle is available for guests from and to Shikotsuko Onsen bus stop.