Board Thread:Questions and Answers/@comment-23899747-20131021021522

Is it Spirit World Warriors' Society or Society of Spirit World Warriors? In most of the episodes I have watched, it was translated as Society of Spirit World Warriors. I believe both translations are accurate - so which one would be the more correct of the two?

By the way, the precise kanji is 異界士協会, and the romaji is what I assume to be Ikai-shi kyōkai. 