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.
Again! Battle: Choose your performing Kensai: Straighten him and all his Weapons. Battle abilities on his Weapons may be used a second time this turn. You may take an additional Battle action.
If you use Again! on a unit where the Kensai's weapons' Battle actions haven't been used yet, do you still get two uses per weapon?
Again! Battle: Choose your performing Kensai: Straighten him and all his Weapons. Battle abilities on his Weapons may be used a second time this turn. You may take an additional Battle action.
If you use Again! on a unit where the Kensai's weapons' Battle actions haven't been used yet, do you still get two uses per weapon?
Yes, that's the correct interpretation.