Japan's First Permanent Castle Sauna Opens at Hirado Castle in Nagasaki (Limited to 1 Group Per Day)
Hirado Castle in Nagasaki Prefecture will debut Japan's first permanent castle sauna, the Hirado Castle Kaijuyagura CASTLE SAUNA, opening on November 1, 2025. This unique facility features a 4-person barrel sauna on the castle turret's terrace, offering panoramic ocean views and authentic Finnish sauna experiences.