We all brag that Steelers Nation is huge, and has members everywhere, so stuff like this shouldn't really be all that surprising. However, I was a big fan of engrish.com back in the day, so making fun of foreigners is always a treat.
Since the Steelers already have Iran and China on lock, it's time for those Asian boundaries to be pushed East...to Japan. As is the case with most videos I post here, I have no clue to the context of some guy holding up what is supposedly a shirt with the Japanese word for STEELERS on the front. He seems excited, and the woman videotaping is totally getting a kick out of this plot development.
Maybe that's all it is. Some woman making fun of a foreigner who is butchering her words. The Steelers were just an accessory to the hilarity.