Wow.
Honestly, I think a lot of people are bypassing this thread just because at first glance, it really seems like something that could be really odd, or even a downright awful mix of sounds. However, upon listening to the piece in full, I'm very surprised, in a good way!
This is a really cool piece, what you have done with the instrumentation is really great. I couldn't tell whether the melody was more Japanese or Irish, so that blended feel really works here.
The only thing is, as it is synthed together, I'm not sure this would translate to a live performance; seeing as there is a huge volume difference between kotos and pipes.
Experimenting with different sounds is the best way to be original and unique. Keep it up, I would love to hear what you come up with next.