Any luck with the pictures? I'm curious about how they compare to an old bow I saw at the Howard Hill World Championship in Wilsonville, AL about 10 years ago. It was made by Duff, former bowyer to the queen, and still shootable. The guy who had found it at a yard sale let me shoot it a couple of times. Duff made and sold them commercially after he moved to the States, and I wonder if it's possible they made it to Japan. If so, they are truly collectibles. They are described in Elmer's "Target Archery", and were shot by Russ Hoogerhyde (not sure of the spelling) He was incredible at hitting the golds. He use three Duff bamboo bows of different draw weights for the different target distances.
The bows were made with vertical lams, overlaid back and belly with another lam.