47 Wars

Current-day Japan is facing the serious issue of population decline due to low birthrates and the concentration of the populace in only a few major metropolitan areas.

Tottori-kun, the local god of Tottori Prefecture, least populous in all of Japan, must face these problems and other social issues as he and the other gods of Japan's prefectures battle it out to become the new capital.

The series features real social, economic, and historical issues, with a dash of humor and creativity--and is also a fun way to learn about the different charms of each of Japan's 47 Prefectures.

(This is an anthropomorphized battle manga)

Synopsis from MangaUpdates:
The story follows local gods of each Japanese prefecture as they battle to rule in Japan's capital.