I've added a note to the Japan YouTubers list asking that future
additions also be posted in the forums here:
http://forums.japansoc.org/showthread.php?t=97
The reason is simple: the group is private, but the forums are public.
If you want more people to subscribe to your YouTube channels, then it
makes sense to list them in a place that is accessible to search
engine traffic and curious visitors.
Personally, I'd rather drop this page from the Google Group
altogether, but if people continue to use then I guess it should stay.