Originally Posted by
Pbartender
Missionaries, missionaries, missionaries and chapels... Plan ahead.
Every town, expect for towns you are using for recruiting should have a maxed out sake den, a market and (most importantly) the highest level church you can build. One you get past the basic chapel, missions and churches not only convert the province they're in, but neighboring provinces, as well -- that's very important on your borders. Also, use missionaries to demoralize enemy armies that are in neighboring provinces. It's free, it gets experience for the missionaries, and they convert the populace while they're at it. If you have the money (and you're missionaries are good enough at it), have them incite revolts as well.
By the time you invade, the enemy troops will be softened up, and the province will be halfway to Christianity already.
Once you conquer the province, plop one or two of your missionaries down inside the town and have them "minister" to the settlement. They'll help with the conversion, and they really calm the populace down, making them much, much happier without the need for such a large garrison... I usually get away with leaving two or three ashi archers behind, if that.