User blog comment:Chartic/Uranus: Another person?/@comment-85.250.163.22-20121015203719/@comment-5623290-20121017014306

Thank you! But actually I don't think that there will be an underwold. Just because Pluton isn't a person, but a warship. I think Oda intentionally did that, so that Pluton signifies destruction rather than the underworld.

But with One Piece, you never know.. there might just be an underworld, lol.