Originally Posted by
Iscah
It's right there in the enemy name: "sacrificed ninja". Combined with the ninjas seen among the enemies in Syrcus Tower, it's not hard to conclude that this was an Allagan discipline.
Aside of getting over the previous assumption they would be focusing on each of the original three city-states, I don't see any particular reason to not go there either. This whole variant dungeon thing is framed as a sort of investigation agency thing, so evidently they have been petitioned by someone in Hingashi (assuming it is Hingashi and not Doma again) this time.
At this point, our "back yard" is all of Etheirys, and Hingashi is just as much a place that we have visited but not explored in depth.
That said, hopefully we are going there because there's a story worth telling and not just because they want to showcase their Japanese setting again.