Hi, Alec, and thanks for the question.
That's where it gets a little tricky, actually.
In this particular case, I'd e-mail AnimEigo and ask them if they can point you in the right direction. (In this case, it might be the Japanese rights holder.)
Hope this helps!
Thanks very much for your response.
I actually did ask them if they had any contact information (in this case for another title they no longer have) and they responded indicating they did not have any information. That may just be that the company they had originally licensed the title from no long exists. Or for whatever reason they may choose not to give out said contact information.
In cases like this where the club or convention has gone through all the due diligence of contacting the last known US rights holders and said companies either do not have or will not provide contact information for the Japanese rights holders, is there any Japanese version of this list that can be provided?
It may very well be that the Japanese companies no longer care too much about these older titles that come and gone over the decades, especially in the case of the US market.
Thanks again for your help. The main list at the beginning of this tread has been extremely helpful for us.