@roboneko International jurisdiction doesn't seem to be a problem. The Japanese embassy got the police in Manila to help them bag the owner of Manga Mura without difficulty. Foreign law enforcement seems willing to cooperate with the Japanese in at least some cases.

What they're discussing in this meeting is ways to pressure CDN operators to be more cooperative in flushing out pirate site operators. I doubt they've thought far enough ahead to think of various darknets, but they also might rightly think that the majority of internet users won't know how to use them, so the remaining pirates will only be a fraction of the original number. Getting the bulk of normies nice and scared so they pay for their manga by the page like good little boys and girls is more important to them, I think.