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, 19 January 2012
Koshin keep>>Recon Reaction: After engaging: You have Reconnaissance at the current battlefield. Until this battle ends, your Ranged Attacks that do not destroy their target have the additional effects, “reduce the target’s Force by the Ranged Attack’s strength and you may take an additional Ranged Attack Battle action that may only target the same card”.
No hiding place>>Reaction: After you announce an action with a Ranged Attack: Give one Ranged Attack from the action –1 strength. That Ranged Attack may target a card in the Defender’s home (if otherwise legal).
strategic strike >> Battle: Bow your performing Scout Personality: Ranged 6 Attack, which may target a Personality with attached Followers if you have Reconnaissance.
both strategic strike and no hiding place allow you to make a ranged attack against a target that normally isn't legal. in either case does koshin's keep ability allow you to target the same target again regardless of followers or being at home?
Jon Palmer (rules official), 19 January 2012
Koshin keep>>Recon Reaction: After engaging: You have Reconnaissance at the current battlefield. Until this battle ends, your Ranged Attacks that do not destroy their target have the additional effects, “reduce the target’s Force by the Ranged Attack’s strength and you may take an additional Ranged Attack Battle action that may only target the same card”.
No hiding place>>Reaction: After you announce an action with a Ranged Attack: Give one Ranged Attack from the action –1 strength. That Ranged Attack may target a card in the Defender’s home (if otherwise legal).
strategic strike >> Battle: Bow your performing Scout Personality: Ranged 6 Attack, which may target a Personality with attached Followers if you have Reconnaissance.
both strategic strike and no hiding place allow you to make a ranged attack against a target that normally isn't legal. in either case does koshin's keep ability allow you to target the same target again regardless of followers or being at home?
No, Koshin Keep does not transfer special qualities of the initial Ranged Attack to subsequent Ranged Attacks it grants. You may however play a card like No Hiding Place to modify the subsequent Ranged Attack as well.