Re: Bleach 528
Though Masaki may have been cut off from her family it still existed in the world of the living and therefore could be verified. It could be tracked for legal purposes like getting a marriage licence, filing taxes, getting insurance, etc... It makes sense for them to use her name and Isshin certainly doesn't come off like a rank obsessed ass like Byakuya can, so he wouldn't care. He still knows who he is.