The following history is from a site claiming to teach a form of ninjutsu. There is no record of this art existing in Japan and the reason they give is secrecy. And yet, they are selling their stuff on e-bay. I don't know didly about Chinese history but many people here do. What is your slant on the following? As far as I can see, the founder of this ninjutsu art was also the first Han emperor. Correct me if my suspicions are wrong- but I would guess that there is no record of Liu Pang being a ninja warrior except for a few silly guys playing ninja in the woods of North America.