At the start of the Guard Phase, Patrolling Guards located on board sections that have an active Ninja on them must each be moved to the tile at the opposite end of the arrow track. If this results in a Guard moving onto or through a Ninja, the player of that Ninja has no choice but to take out the guard (see related rule).

The same process also applies if an Alarm Card or Buki Card/Token (PvP game) results in a Ninja being moved into a Guard or Guard moving into a Ninja.