Board Thread:Questions and Answers/@comment-24867665-20140426194343/@comment-1268838-20140426195228

From Cnet: "It could bring shame to the whole Shiba clan if people see a family head, even of a branch family, acting the way you do!"

This statement directly supposes that the Shiba clan has multiple family heads, and that Isshin was just the head of a branch family. That being said, I am not sure why your edit was undone.