Board Thread:Theories and Speculation/@comment-24815383-20150827211945/@comment-5273810-20150831011500

Thekillman wrote: BlueLantern1995 wrote: Not that the Kakashi Anbu arc is canon but Orochimaru would have 100% seen the Sharingan then as Kakashi was using it during their clash. I wasn't certain if that was in the Manga too. In that case, it's a simple continuity error. It isn't in the manga just pointing out that bit of information should it be relevant or not.

No matter if you want to take that bit of information into consideration or not I'll just label it as a continuity error as even if such a confrontation never happened, Orochimaru should have definitely at one point or another seen or known of Kakashi's acquiring the Sharingan.