User blog comment:Silver-Haired Seireitou/Fanon Canon Part 2/@comment-18812574-20141121052517/@comment-2089817-20141121053237

Well, when I mentioned the factions, I meant other groups that were like Yamamoto's Gotei, trying to take the land of Soul Society, and after they failed, they were pushed back onto the outskirts of Soul Society (outside of District 80), and formed their own small societies in order to survive. But the use of other afterlives can be used as well in this.

I don't think there is a need for a mathematical system for the districts. We already know how they're set up. Districts 1 through 80, on each of the cardinal directions. "North 50", for example, is precise enough that there wouldn't be any crossing.

And regarding the dojos, yes, that can be possible too. This is why I want it to be up for everybody to play with and possibly create dojos of their own. Sei's Kawahiru Dojang has been around for a while, since he had not feared Yamamoto, even prior to his death.