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, 17 March 2009
With the card "Ambush" I target one of my personalities and my opponent's "Pekkle no Oni". (for the sake of realism) I use sneak attack and in some way kill Pekkle no Oni.
May my opponent use deeds and words to negate the honor loss from Pekkle no Oni's death? My playgroup is split on whether it works or not.
Zen Faulkes (rules official), 17 March 2009
With the card "Ambush" I target one of my personalities and my opponent's "Pekkle no Oni". (for the sake of realism) I use sneak attack and in some way kill Pekkle no Oni. May my opponent use deeds and words to negate the honor loss from Pekkle no Oni's death?
Yes. Ambush and similar cards do not create an Attack Phase (http://rules.l5r.com/Battles#Battles).