Like us on Facebook, follow us on Twitter! Celebrate another year with MH and read our yearbook.
Manga News: Check out this week's new manga (7/21/14 - 7/27/14).
Forum News: Visit new sections for Nisekoi and Kingdom!
Well, technically tobi only inferred the whole thing was orochimaru's experimentation. There is also the consideration that orochimaru working with danzo would necessarily imply that orochimaru was being observed and thus was somewhat more limited as to what he could do on his own which is a problem if he is experimenting on dudes capable of immediate brainwashing. I guess either way this would ultimately be a plothole though.