Okinawa Prefecture Product: Ryukyu Yokobue (Japanese Bamboo Flute) Made of Bamboo (A Sharp Key). This is the pitch. Handmade, brand new, unused. A Sharp key, two tones lower than the standard C key. Due to the natural bamboo, the color and appearance may vary slightly from piece to piece. The tuning depends on the thickness and length of the bamboo. Made in Okinawa Prefecture, handmade. *Tuned by a Ryukyu flute master, so you can be assured of its quality. *Ryukyu Yokobue Text Service