Re: The Kurosaki family (Bleach)
Yeah I agree it's sort of weird really Ichigo is kind of like the ultimate noble.
My money would be on Masaki being related to the king of the Quincies and in extension so would Ichigo, it makes sense with the whole thing when Ichigo asked Juha if he was the enemy.
Now Isshin Shiba huh, also makes sense Kaien looked far to much like Ichigo for it to be a coincidence and it's because they are cousins, and your right Karin does look like Kukaku a little doesn't she.
And it's also fits into how Yourichi knows Kukaku and Isshin they are Shiba's a Noble family like Yourichi's, also remember when Byakuya said that those from the noble houses were born with superior Reiatsu.
Just in case people are forgetting the surname Kurosaki is either a fake name to hide away from Soul Society or it was Masaki's real last name.
Now though I don't think they ever mentioned a Shiba being captain of the Gotei 13 did they...Zero squad anyone and it also fits that Isshin was in Zero squad since the Zero squad talk to Kukaku.