I remember seeing this movie as a kid, mostly because of the recurring theme song of the movie which basically consisted of a high pitched voice repeating the name "WATARI" over and over again. At least it seemed that way. Anyway, what I can recall is that there were families or villages of ninjas that used different weapons or techniques. I only remember Watari and his dad, who kinda looked Mongolian actually, running around in the woods wearing thigh length kimonoes. Their weapon of trade was the axe. A big one for daddy and a cute one for little Watari. Watari could blow fire by spitting oil out of his mouth which he stored in his axe handle. They also used vines to swing on if they were really in a hurry. Don't remember the plot at all though, but I betcha that some bad guys came and killed people which in turn forced Watari and friends to take revenge. I loved this movie as a kid, but I would have to think that'd be different now. Compare it to Power Rangers or Kikaida.