Board Thread:Naruto Discussions/@comment-4700229-20141027210331/@comment-1018594-20141105222328

I see. That makes sense. It would help a lot more if their actual relation was stated, though. Madara's enough generations back to at least be Obito's grandfather, and Kagami, someone who would be around Hiruzen's age, couldn't possibly have had a son in Itachi's age group; Itachi was 14 when he slaughtered the clan and it was stated Shisui was the elder of the two, so I'd place him at 18-19 at the time of his death. That gives him enough time to become known as Shisui the Teleporter, (according the Danzo) the strongest Uchiha of his generation, and also time to have encountered Ao.