Okinawa is known for its climate, beaches and distinct culture, but its real hidden treasures are its female vocalists.

Keiko Kinjo is one such treasure. It's hard to stand out in such a crowded field, but she has been active for many years, performing and recording with many of the great musicians of Okinawan minyō (folk songs). At the age of 65 she is about to release her first solo album, "Umui."

I meet Kinjo at the Otome bar where she performs regularly in Ginowan, located in the middle of Okinawa's main island. It's a blazing hot afternoon by the time I arrive and I'm 20 minutes early, but Kinjo is already standing in the doorway waiting for me. Unlike the Okinawan stereotype of the poor timekeeper, she's also pleased I'm early.