Yaeyama
Far south of the main islands of Japan, is the tropical Okinawa group. It was a separate kingdom called Ryukyu and only formally became part of Japan in 1872. Far south of Okinawa island itself, as far from Okinawa as Okinawa is from Honshu, is the small group of islands called Yaeyama. The main inhabited island is called Ishigaki. We went there for Christmas.
It was nice.