The 80s was big on Martial arts flicks, I could remember American film companies jumping into it with mediocre Ninja films of all sorts, - (Chuck Norris, Micheal Dudikoff cheer leading the way).
I love them yes, even the corney ones...but if I had to suggest good japanese martial art stuff I would suggest these two (from my collection)
starting with most recent favorite.
and the classic Shogun Assassin
...theres nothing better than listening to men get cut to pieces and blood splatting across the screen while in the studio- painting!.