Itachi Genjutsu outside Sensor Division Range

Viz, "Uchiha Itachi is the only one I know of who would be undetectable by my sensory unit, yet still be able to manipulate with Genjutsu" "But wide-scale controlling of this many individuals in multiple locations simultaneously is impossible even for Itachi"

Princess of Iwagakure, "Shikaku: There can be no other explanation than that they are manipulating the shinobis of the five nations by genjutsu.
Shikaku: Could it be Itachi?
Ao: Only a guy like Itachi would be able to stay at a distance where our sensor unit cannot sense him and manipulate through genjutsu...but
Ao: It is impossible for even Itachi to manipulate many people precisely and simultaneously at different locations in such a wide range!"