Board Thread:Naruto Discussions/@comment-3568954-20140709105551/@comment-1512913-20140710141054

Deva and Asura realms are one and the same, likely some prosperous environment like forests and cities. We may be yet to see it. Preta realm may be the desert Sasuke is in. Naraka realm may be both the lava and ice worlds. The place which connect all of them may be Outer Realm. Animal and Human realm may the world Naruto series takes place in.

Reason: mythology.