Hi Ojo no Kami,
There are a few people here that did spend some time with great japanese masters.
I believe Barry is one of them. He has got some very nice posts with pictures of these masters. You would have to look around.
This one is the one I can find to show you the overlay technique.
http://www.handengravingforum.com/sh...p?t=972&page=3
This one is more chinese design, but the technique wont differ that much.
http://www.handengravingforum.com/showthread.php?t=4695
I also believe Jim Kelso makes very nice art in the japanese style.
Will be something to research for you on this forum