Tobi using shuriken
After storing a target within Kamui's dimension, the user can then eject it from their eye at any time.[9] This can be done with varying degrees of force, allowing the user to eject weapons at a moment's notice, giving opponents little opportunity to react accordingly.[10] Despite not always being present, Obito could keep targets under genjutsu while they were confined inside Kamui's dimension, thus keeping them incapacitated for extended durations.[9]

Kamui can synchronise with another space–time ninjutsu, granting the user access to the synchronised technique's dimension, as well as any other connected dimensions.[11] Once the dimension has been marked, the user can freely travel between it and Kamui's own dimension.[12]