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, 4 May 2008
Kaiu Hisayuki Crab Clan • Samurai. Increase by 1 all Force bonuses Hisayuki receives from abilities on cards that are not in this unit. These increases last as long as the bonuses do.
Tight Quarters Terrain Battle: Enemy Personalities and Followers at this battlefield have -1F. While your Family Honor is below its starting value, Samurai and Berserkers in your army have a Force bonus equal to the number of units opposing them; this cannot give more than +3F per card.
Can Hisayuki get +4 force because of his trait, or does the limitations of Tight Quarters also limit his own ability?
Zen Faulkes (rules official), 4 May 2008
Kaiu Hisayuki + Tight Quarters: Can Hisayuki get +4 force because of his trait, or does the limitations of Tight Quarters also limit his own ability?
Point: Kaiu Hisayuki does not have an ability. Abilities are Limited, Open, Battle, Reaction.
Kaiu Hisayuki's trait doesn't give a separate bonus. It increases the one from Tight Quarters. It is thus limited, because Tight Quarters limits the size of the bonus.