Hi Jeanne: Yes there are quite a few from what I understand, even books on CI-related topics - one of mine is translated into Japanese as is one of Dr. Prescott's)-- although it would be better to ask one of our Japanese CI experts about them. I'd suggest contacting my friend Dr. Yoshio Sugasawa, who is a professor at Nihon University. His e-mail is firstname.lastname@example.org.
On another note, I am just finishing at present an article looking at, among other things, Japanese CI practices. Although I admittedly have access to several dozen (English language) articles about this area, I am curious as to whether any articles written in Japanese can be accessed over the web and translated without great expense? Are there any blogs devoted to Japanese CI practice? I have found several dedicated to Chinese and Korean CI practice, among others. These are the days I wish I was multi-lingual!! Good wishes.
To add to Craig, another connection in Japan in CI is Juro Nakagawa who has been doing CI for a while. He is a professor at Tokyo Keisai University and can be emailed at email@example.com.
Another group to reach out to is the Tashiro Research Institute. Kosei Tashiro runs it, and the firm does CI, and I think is pretty large for a CI consulting concern. Kosei can be emailed at firstname.lastname@example.org. This email is old, but I imagine you can find them on Google in Japan.