Assassination is simply the killing of another member whose not from your village. When you see someone who isn't from your village put somewhere in your post you assassinate that person but only if they aren't welcome(i.e. rival/warring village)

After that person is assassinated once they can't be killed again for that post. So people if you see the person in front of you killed someone don't say you kill them still.

When the official Shinra Banshou contest is happening, the amount of assassinations from each village will be tallied and taken into account when the winning village is being chosen. So get to killing

*You cannot assassinate someone who is at least two ranks higher than you. Crew members are exempt from being assassinated and cannot assassinate members*