Mirumoto Kyoshiro/Doji Iza ability doesn't state that his action is an Iaijutsu action even though it creates a duel so can I use the stipend to increase his chi?
Mirumoto Kyoshiro/Doji Iza and Magistrate's Stipend
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.
Mirumoto Kyoshiro/Doji Iza ability doesn't state that his action is an Iaijutsu action even though it creates a duel so can I use the stipend to increase his chi?
Yes, you may. Not all duels are of the Iaijutsu variety.