Hell

Hell is where people go after they die, it is administrated and presided over by the Second-class God Amaterasu.

All creatures on the Continent with souls derived from Creator God Ludo-Rathowm go to Hell after death.

Souls can only return to Ludo-Rathowm for future reincarnation if they have no pollution on them, meaning that they need to be purified and reverted to a blank slate before passing through the Whale again. This is where the Oni come in, the Oni live in Hell, and their leader is the Oni King. The Oni are agents of justice, and their job is to "cleanse" the souls of individuals until their minds are wiped completely and they become acceptable blank slates. The process usually involves years and years of slow, horrifying torture.

Though Oni are the main workers in Hell, some Angels work as business administrators in the upper levels, the upper area is mostly office space.

While Hell is technically a world meant only for souls in the afterlife, it seems some physical connections to the Continent can be made, as seen with the Hell Holes scattered across JAPAN. The entrance to Hell is the great River Styx, guarded by the Kaijuu Gogo.

It doesn't matter who you are or what you have done in life, be you a pure paragon, a simple farmer or an evil king, you will go to Hell.

The Oni will always find a "crime" you have committed to justify their torture with, no matter how arbitrary it may seem.

Although you can avoid going to Hell after death if you are a follower of the Tenshi Sect, the rituals involved with that religion divert your soul from the Reincarnation Cycle and takes you straight to the Devil Realm and into Rathowm's mass after death.

Trivia
Ishimaru is the only human to go to hell and back.