1405-223 Shinzato, Ueno, Miyakojima City (Miyako Island)
Hours: April-September: 12:00-22:00; October-March 14:00-22:00 (Last entry 21:30)
Outside visitors: Allowed
Admission: 2,000 yen for adults, 1,000 yen for ages 4-11, free for under 3.
This is the southernmost and westernmost natural hot spring in Japan, featuring an open-air bath, a bath with panoramic views and a large jungle pool.