Samurai Films. It is also the first of all the cripple-kung-fu films. Due to its subject mater of a one-armed martial artist it was also the movie that made it okay to show blood & gore in Kung Fu films.
One-Armed Swordsman would spawn a few sequels, remakes and ripoffs. It would also inspire films like The Cripple Masters and The Crippled Avengers. While the Kung Fu might not be overly amazing in this one the bloody mayhem and influential style makes it a must see for fans of Kung Fu films and the Samurai genre. Its a perfect blend!