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, 8 September 2014
If my Crane opponent announces Daidoji Gensai's Home Battle action, and I interrupt with Final Sacrifice onto my Yojimbo (with no followers) at the current battlefield, is he then forced to discard a card (if able) in order to make a ranged attack targeting that yojimbo? (assuming Gensai's movement is successful)
And would this be different if the Crane player had Sacred Temples in play?
Relavent card text: Daidoji Gensai Home Battle: If Gensai would be opposed, move him to the current battlefield. After he moves, you may discard a card to make a Ranged Attack with strength equal to the card's Focus Value.
Final Sacrifice Interrupt: Target your Yojimbo. The action must target him, if legal.
Sacred Temples Other players' actions will not discard cards from your hand.
Jon Palmer (rules official), 24 September 2014
If my Crane opponent announces Daidoji Gensai's Home Battle action, and I interrupt with Final Sacrifice onto my Yojimbo (with no followers) at the current battlefield, is he then forced to discard a card (if able) in order to make a ranged attack targeting that yojimbo? (assuming Gensai's movement is successful)
And would this be different if the Crane player had Sacred Temples in play?
Relavent card text: Daidoji Gensai Home Battle: If Gensai would be opposed, move him to the current battlefield. After he moves, you may discard a card to make a Ranged Attack with strength equal to the card's Focus Value.
Final Sacrifice Interrupt: Target your Yojimbo. The action must target him, if legal.
Sacred Temples Other players' actions will not discard cards from your hand.
If the Crane player has Sacred Temples in play, no use of Gensai will trigger it - it's Gensai's controller's ability forcing the discard.
Final Sacrifice will not force Gensai's controller to activate his ranged attack ability. It is still an optional ability, and they can choose not to use it, in which case his ability produces no targeting and the Yojimbo will not be targeted.