I'm starting to have my doubts here. I mean... lets take it out of the context of the Shorinjin-ryu Ninjitsu for a moment, so the Shorinjin-ryu guys can see what I mean.
Because you see, I study an ancient Vyking Axe Fighting Art from Norway. My master is Ragnar Lobrok, and he learned from his master who was an Uncle. His family didn't know he studied it because it was a less well known axe art, only taught uncle to uncle, so dont ask his dad, he doesnt know. Don't look for it in norway tho either, because his family was the only ones who knew it it was so secret. And being Vikings, they couldnt read or write, so you will not find a written record of this style being used, even in accounts of combat written down by their enemies. Also, see, they use the word Vyking, but they werent actually Vikings, so they changed the spelling because it has a different meaning in norway where no one has heard of it.
Also, the axes they use were not traditional Viking Axes, they actually look like modern Army entrenching tools. No, there are no examples of the originals in Norway, My masters family has all of them.
But Ive seen him swing that axe, so he is for real!
Ok... now, admit to me, my story doesnt sound REALLY REALLY far fetched... But its just an echo of the Saito story... The lack of ANY record of the style, even by the opponents of it, no evidence that the "pineapple knife" they call a Tengu Sword in any records, artwork, private collections (Except the saito's) or museums...
I dunno. It sounds funny to me...