Hi Barry,
I live in Japan and have looked into hunting there extensively. Bowhunting is illegal, rifle/shotgun hunting is not, although owning a gun is very restrictive. Most Japanese don't know that owning a gun and hunting is even possible and there is very little recruitment of new, young hunters into the sport, most the hunters I've met are over 60. I like your idea of promoting hunting there, but doubt they will ever change the law to allow bowhunting, you never know though. I don't personally speak much Japanese, but know several Japanese that speak excellent English, so if you are interested in moving forward with your project, send me a message and I can contact you via E-mail.
Chris