Three of my favorite kills from my Ninja Ryukenden III speedrun. Clip one: First form of the final boss, I use a trick to hit him with precise timing using the very top of the sword hitbox, one pixel away from missing. This way you can kill him before he flies to the left side of the screen. A lightning-fast quick kill, truly shocking. Clip 2: the sixth boss demos some of the worst hit boxes in the game, look how I miraculously don't get hit by those falling boulders. Clip 3: The 5th boss quick kill, get him before he can jump out to the left hand side. Slightly easier to do in the Japanese version since you have more Ninpo by this point in the game but other than that, boss fights are pretty much the same between regions. They don't do more damage in the US version or anything.