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.
Bayushi Hisako
Reaction: After Hisako is destroyed: Dishonor another target Personality who opposed her when she was destroyed, or who performed the action that destroyed her. The target cannot be rehonored this turn. Bow him if he is Crab Clan.
One Crab with 45 Force attacks my Province (Province Strength 7). Bayushi Hisako defends. Everbody passes. I use Hisakos action.
Question: Is my province destroyed?
One Crab with 45 Force attacks my Province (Province Strength 7). Bayushi Hisako defends. Everbody passes. I use Hisakos action. Is my province destroyed?
http://rules.l5r.com/Battles#Resolution_Segment: "Compare the total Force of each army. ... Any changes to army force after this point... do not alter the outcome." (Emphasis added.)