Shirasuna Open-Air Bath

Shirasuna (露天風呂しらすな, Rotenburo Shirasuna) offers a rare onsen experience with stunning ocean views right on the beach. This large seaside bath can hold up to 100 people, creating a lively and relaxing atmosphere. What makes Shirasuna unique is its open design — the bath is in full view of the surrounding area, blending the soothing charm of hot springs with the refreshing sea breeze.

Because of its public exposure, Shirasuna breaks traditional onsen customs by requiring all guests to wear bathing suits. It’s perfect for groups, couples, and families who want a fun and casual hot spring experience while enjoying the beach. With its one-of-a-kind setting, Shirasuna is an unforgettable stop for travelers seeking both relaxation and novelty by the sea.