Mijin Gakure is the Ninja's special job ability in Final Fantasy XI. It is learned at level 1 and has a recast time of 1 hour. It sacrifices user's life to deal heavy non-elemental damage to foes proportionate to their HP. It is generally used as a last resort. No experience points are lost upon being knocked out, and when Raised, the player will be brought back to life with 50% of their HP intact and no weakened status normally affiliated with K.O.

If the Innin ability is active, and a Ninja uses Mijin Gakure while behind an enemy, the ability will receive a damage bonus. When Notorious Monsters use Mijin Gakure, the explosion deals massive Area of Effect damage, and does not take the enemy's life.

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