I bet he only carried that for the news crew, I can't see him carrying it any other time. I suspect that by the time he had it in his hand whatever was going on would have finished, I doubt he's that good otherwise why would he want the publicity lol! However with all those sailors from nearby Yeovilton I'd be careful if I were him, they are always up for a good laugh and that well could be him, he'd look good atop the flagpole on camp there!
I'd actually bet against that.
I was trying to avoid the potential fraudbusting rules here, and shall try to do my best to dance around them, but be warned, it won't be easy. For reference, Ken Andre's site is found here:
http://www.tengujutsu.com/
Ken is an odd one, frankly. His story has changed a number of times, even in the last year or so, going from claiming that "Tengujutsu" is his own creation, based on his military career and training (seemingly more TKD than anything else), he has claimed a connection to the Bujinkan, and then claimed that there is no connection at all, he has claimed that he inherited Tengujutsu from a teacher who taught him for 17 years, then the claim changed to having been taught for 2 years... the current version of the site features a smaller history than it used to, and some of the more bizarre costumes (one with rubber spikes sticking out in all directions, with the caption "Martial Arts with Sting!" leaps frustratingly to mind....), but the odd "teachings" remain. There is doubt as to exactly what his military training was, most pictures that he has put up are seemingly out of place (odd use of equipment, for instance), and pictures of him in his late teens/early 20's with Chinese weaponry training by himself... which is apparently evidence of his military career(?).
In short, Ken has no background in anything legit to do with Ninjutsu, has a very troubled history in terms of credibility. Add to that the constant "startled bunny" look he has leads me to believe that there may be some more pressing issues at play, as well as some of his behaviours exhibited on his clips.
Ken is a delusional individual who genuinely believes everything he says. When he does out, he gets fully kitted up as you see in the video, as it genuinely makes sense to him. "News" reports such as the above do little more than give a cheap laugh to those watching them while simultaneously feeding and validating the delusions and beliefs that Ken has. Frankly, he should be stopped before he gets stabbed or shot, and doesn't come home to his kids. I see nothing positive in giving him this form of attention.