If Orikasa bows in place of discarding the favor, is it treated as a political action allowing her to straighten herself with her interupt?
Shibata Sensei and Shosuro Orikasa
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.
If Orikasa bows in place of discarding the favor, is it treated as a political action allowing her to straighten herself with her interupt?
It would depend on the action. Both Rulebook Favor actions are Political, and if Orikasa bows to pay the favor cost via Shibata Sensei, you could Interrupt the action and straighten her. I can't offhand think of any non-Political Favor actions, but they could exist, in which case just bowing her wouldn't make the action Political and let her trigger.
Anyway, that's a bit convoluted, but for all practical purposes I could find, you'll always be able to trigger Orikasa off the action for which she's bowing to pay the cost via Shibata Sensei.