BLUE BASE SENAMI
Private sauna cottage facing the Sea of Japan at Senami Onsen
Open-air outdoor bath
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Private onsen bath in guest rooms, for overnight guests only
Blue Base Senami is a private sauna cottage in Senami Onsen, in Murakami. The cottage has its own sauna, a cold plunge, an open-air bath and rest chairs, and the Sea of Japan lies right in front. The bath indoors runs with hot spring water. Reviewers describe the cottage as new and clean, and say you can rent it on its own for a few hours of day use (higaeri nyuyoku, 日帰り入浴), so the sauna, cold plunge and chairs are yours alone.
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Last updated October 13, 2026