User blog comment:BU1898/Bleach: So Many Questions/@comment-2094364-20100530011500

@Pwndulquiorra

I don't think it's farfetched. Two reasons. We don't actually really know how succession works in the noble houses, Kaien may have been the oldest. That's normally how stuff like that works. Also, Kaien's death. We don't really know the exact time/how long he was killed and/or been dead. So maybe at that time Isshin wasn't as strong as Kaien was to be the head of the house. That's if we use that theory strength on how succession is decided. During the flashback of Kaien's death Ganju was just a child. Souls in the SS age slowly and we know that Rukia is old as well. So who's to say that after Kaien's death that Isshin didn't take up becoming the Shiba clan head. Between the time of Hitsugaya becoming the squad 10 captain and when Urahara left the SS there is a hole. And in that hole a lot happens before the main storyline, including the fall of the Shiba house, Kaien's death and Isshin's story, I think so anyway. It seems logical to me, but I don't really know. Now if I missed something and the time that Kaien's death was clearly stated then I apologize. But like I and you have stated it's speculation and we won't know anything until we get Isshin's backstory. But Isshin being apart of the Shiba clan isn't that farfetched but to me more of many possibilities to the Isshin story.