NINJA GAIDEN 3: Razor's Edge

Every Ninja Gaiden is difficult on master ninja difficulty. Be prepared to see the continue screen more than usual. Enemies will try grab you 75% of the time, and block nearly all your attacks. Find out what tactics to use on certain enemies and try to fight one on one. They will come at you in waves and they love attacking you while you’re attacking another enemy. As soon as your health bar turns red, use your Ninpo. One grab may cost your life if you’re in the red.

This thread readthemotto's boss tips can come in handy if you're stuck on any boss.

Note: Kagerasimaru's Master Ninja Guide