Shoji Assassination lets Jin stab an unaware enemy through a paper sliding door. You learn it while storming Castle Kaneda in Shadow of the Samurai.
Even an enemy busy a short way from the door, like one kneeling to cook, ends up standing at the door when you strike.
Use it inside buildings to kill without opening doors or leaving bodies in view.
Archery
Aim and fire a bow.
Assassination
Kill an unaware enemy with a quiet stealth attack from behind or above.
Chain Assassination
Assassinate two nearby unaware enemies one after the other.
Chain Assassination Master
Chain up to three assassinations in quick succession.