A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 23 February 2012
If a player were to use Fury of the Sea's ability in battle against another player's samurai personality, could the opponent react with Know No Fear's reaction to negate the movement or not? Is Fury of the Sea's ability targeting a personality or not?
Fury of the Sea Water Battle: If this Shugenja is unbowed, bow him unless he is Water: In turn order, each player who now controls a unit in the current enemy army targets and moves home one of his units there.
Know No Fear Bushido Virtue • Courage Reaction: After another player's action targets your performing Samurai: Negate his bowing and movement from the action's effects. Reaction: After a Fear action targets your performing Samurai: Negate its effects.
Ben Higgins (rules official), 24 February 2012
If a player were to use Fury of the Sea's ability in battle against another player's samurai personality, could the opponent react with Know No Fear's reaction to negate the movement or not? Is Fury of the Sea's ability targeting a personality or not?
Fury of the Sea Water Battle: If this Shugenja is unbowed, bow him unless he is Water: In turn order, each player who now controls a unit in the current enemy army targets and moves home one of his units there.
Know No Fear Bushido Virtue • Courage Reaction: After another player's action targets your performing Samurai: Negate his bowing and movement from the action's effects. Reaction: After a Fear action targets your performing Samurai: Negate its effects.
Fury of the Sea's ability is indeed targeting, and therefore the opponent could react with Know No Fear to keep his Samurai Personality at the battlefield.
Know No Fear doesn't care who chooses the targets, only who's action the targeting is coming from.