Ninja 外伝 (Gaiden) 3 revised by a lot. This time around TheAxeMan takes damage to speed things up, and utilizes the special weapons more efficiently (every weapon is used at least once). The bosses are also taken down a lot more aggressively by using some unorthodox techniques to increase your attack speed.
We recommend reading the author's comments for this movie - there's a lot of it. :)