Second Tohoku Jump Hole
Well, here's the answer.
Its one of the few things done logically in Freelancer. If this jumphole didn't exist, then the whole mission against Tekagi's Arch would have been pointless. Why? Because the Chugoku hole is the only other exit out of the system, and thus Tekagi would have had to cross Blood Dragon home turf to leave to Rheinland. Not a very good deal for him, and the BD's would have never had to leave home to nail Tekagi. So that's my two cents worth.