Board Thread:Questions and Answers/@comment-24826159-20140416214818/@comment-9082368-20140418230724

Not all shinigami came from the Rukongia, if I remember correctly Tetsuzimon Iba (or how ever you spell his name) was born in the Seireitei, and while still a soul, he may never have lived as a human. That is just my two cents, which may or may not even be accurate