If you think that's irritating, what do you think of the drunken American dudebros shouting ultra-dumb dudebro shit to break the respectful semi-silence?
I was lucky enough to go to a UFC show on my first trip to Japan and it was great. You could hear the action in the cage from where we were sitting because it was relatively quiet. There was an audible smack when Hunto broke poor ill-beset Stephan Struve's jaw. The only unpleasantness came from drunk shitheads.
Having said all that, I presume you're taking the piss. I mean, who doesn't enjoy their restrained but joyfully happy enthusiasm for mayhem and violence?