Yubaraonsen Sunayu is not your typical open-air hot spring spot. Located in Maniwa city in Okayama prefecture, this open-air hot spring, is right in front of a dam! It's also a mixed sex hot spring, but don't worry ladies, a special clothing can be rented free of charge that covers up any unneeded exposure and lets your enjoy this relaxing and beautiful hot spring without worry of being seen! So enjoy the freedom of being outside in this relaxing hot spring, in this unique setup of being in front of a giant dam!