The Shakuhachi is a Japanese end-blown flute. Traditionally made of bamboo, it's also possible to make your own from PVC.
Making a PVC Shakuhachi
How to make a PVC Shakuhachi
Improved PVC Shakuhachi
How to Make a 1.8 PVC shakuhachi
The Making of the PVC Shakuhachi Flute
Shakuhachi Yuu (ABS Shakuhachi)
Drills and Lessons
Youtube - Shakuhachi Flute Lessons
How do woodwind instruments work?
The Way of Watazumi