I recently took up learning the shakuhachi. It's hard to play, especially as I have no experience with open flutes. But I can get solid notes out of it, it just took about four hours of practice.
I also have a Native American style flute (made popular by Carlos Nakai back in the 80's and 90's). It's alot easier to play (fairly simple in comparison, it has a block or fipple similar to a whistle or recorder), but doesn't have the same type of dynamics as an open flute.
My shakuhachi is actually made from PVC by a flutemaker in Brazil. I ordered a resin model from Japan that should arrive before Christmas.
I'm interested in exploring suizen (blowing Zen) with the shakuhachi. This isn't actually about music meant to be performed so much as a spiritual practice. Some have argued it's "anti-music".
Here's an interesting video about an African American man who left the US on a boat years ago for Japan with his wife. He's a Chan (Zen) priest and is also a modern day
Komuso in Japan.