That video has been doing the rounds for some time now. The japanses instructor is Masuda - an excellent fighter in his prime. It was supposed to be just a training exercise - a little light sparring which is why nobody on either side is really going for it - so it doesnt really prove anything. Traditional Fist is right in his view of the video except to say that It wasn't a publicity stunt to promote Kyokushin but I can see how people are saying that.