Thread:DazzlingEmerald/@comment-25436862-20151028153639/@comment-25152698-20151028210848

Well, that secret wasn't known to many outside the huddle of Konoha's council, really, and I don't think they would have told anyone. Heck, I'm pretty sure Tsunade didn't even know. Evidently though, no one is better at keeping secrets than the leaf, as they proved by keeping the Nine-Tails secret about Naruto a secret all those years. So no, Sayuri would not have known the truth behind the massacre, but she would be knowledgeable about it, since she was born during it, and that interested her enough to research it later. (Again, even with research, she's not going to be able to crack the case)