Japan just basically hired Yuri to hold the most dangerous gun to their heads that he can basically pull the trigger at any moment and only a handful of people would be able to help with the ensuing tragedy (because to be honest I kinda get the vibe that after he puts a barrier around the gate that he would turn around and demand more money or something ridiculous that they didn't agree to and he will basically blackmail them with no one else wants to help and most likely can't) , but thankfully he gets dealt with swiftly for his overconfidence and greed and MC has to step in to fix everything