The super bowl is broadcast internationally. Many countries actually have their own broadcasters so they can air the game in their own language. I am pretty sure I've seen in years past, Japanese broadcast teams at the Super Bowl, so I'd guess it's the same. If they cannot find it on television (which I'm almost certain that they will find it televised) it will be streamed live as well. Check these links for more information:
[urltargetblank]http://www.nfl.com/superbowl/48/live/watch-free-live-stream-online[/urltargetblank]
[urltargetblank]http://msn.foxsports.com/foxsportsgo/[/urltargetblank]