Board Thread:Theories and Speculation/@comment-3001903-20160813042916/@comment-732150-20160816175707

Sarutobii2 wrote: Wasn't exactly a secret he had it seeing as Ao and Kabuto were aware he had Kotoamatsukami. Ao knowing he had a mind-controlling genjutsu is one thing, knowing specifically it was a MS genjutsu is another. Even when the jutsu first appeared, we only listed it as Sharingan, because there was no talk of MS with it until Edo Itachi triggered it. I guess it's possible he could have seen Shisui's MS design from a distance, but not mentioning it was a MS when he caught Danzo used it seems rather odd. Kabuto was a highly trained spy, who probably only learned a lot of secrets after becoming loyal to Orochimaru, as Orochimaru was responsible for Danzo's various implant enhancements.