Yeah, what he said... I recommend setting up training shops in those specialty provinces: Kaga, Kii, Yamashiro, Totomi, Satsuma, ect. (AND) in at least one province that will support an armory & port. Once a major campaign is underway & things are going well for you, this should be easy to accomplish.

For instance, if you have a temple complex & legendary palace in Kaga, your monks will leave the training grounds at honor 3 with fantastic morale. Send them to say Hitachi, where there's a legendary armory, swordsmith & drill dojo, retrain them & place them in a rank 5 general's army, and you've got some deadly ass honor 5 armored Kaga monkeys.

Reversing the process works just as well. This is also nice in the end game where often a person has a good many surplus troops. You can decommission the superfluous troops & concentrate on high quality, well trained ones.