User blog comment:Daime17/Who among the the god, goddesss, and other heroes that we have not seen yet to be shown in the series/@comment-189.251.110.145-20141113000704/@comment-16281343-20141113001028

I don't think Ishibumi would be able to use those gods as they're not that popular compared to the ones used (Norse, Greek, etc).

~If you're looking for a LN that used those gods, try Campione!