A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from the Wayback Machine (its copy), so posts 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.
For Shinjo Tianyi:
Bow Tianyi, or target and bow a Weapon you control: Target a Personality who attacked you since the end of your last turn. Bow him.
Can you clarify "attacked you?" Is a unit consider to have attacked you after they assign, or not until after battle resolution, or not until after all battles that attack?
Shinjo Tianyi: Can you clarify "attacked you?"
Someone currently attacking doesn't qualify by virtue of attacking now.