A Japanese magazine, SPA!, claims that Steve Jobs was stopped by airport security last year, even though he was boarding his own plane. According to the report, they objected to a set of ninja stars. From Bloomberg:
Jobs said it wouldn't make sense for a person to try to hijack his own plane, according to the report. He then told officials he would never visit Japan again, the magazine reported. Apple declined to comment.
A Kansai airport spokesman confirmed that "a passenger using a private jet was stopped at the end of July for carrying shuriken." They were then discarded. Fortunately for Jobs, they did not find his smoke bombs, caltrops or flash powder, ensuring that the flight remained safe from attack by the evil ninja, Sho Kosugi.
Update: The WSJ writes that "Apple says that Steve Jobs is not a ninja."