I'm guessing Ijin just went to the harbor as well. This looks like easy pickins for Ijin compared to his previous fights with guns and knives. Let the carnage commence.
I know why he does it, all the adults just want Ijin to have a normal life. Having said that, if I were Ijin I'd be like 'Dude, have you MET me? I'm possibly the most qualified person in the world to deal with whatever the issue is, assuming the issue can be dealt with using violence, blackmail or economics.'