Various Japanese media outlets are reporting that North Korea's failed Taepodong-2 missile was on a trajectory that would have carried it near Hawaii, had the missile completed its test flight.
At this point, a little perspective is in order. Given the missile's short flight duration, we can't say with any certainity where it was aimed. According to missile analysts I've spoken to, the TD-2 had apparent guidance and control problems from almost the moment it left the launch pad, meaning that it's flight trajectory was highly erratic, at best.. Radar tracking data from U.S. and Japanese naval vessels--cited in Japan media reports--should be taken with a large grain of salt, because the missile (in all likelihood) wasn't following its intended trajectory before it failed, roughly 45 seconds into flight.
Additionally, the azimuth assessment for the TD-2 was revised several times before the launch, based on the best available information. Early projection suggested the flight path might carry it toward Hawaii, but later estimates suggested an azimuth that would carry it further away from the islands.
From what I can judge, the Japanese media reports are speculative at best, and not necessarily supported by available information.