Board Thread:Theories and Speculation/@comment-31338621-20200901181802/@comment-31338621-20200905211201

BloodOfTheArchon wrote: Idk about maintained, the launch of Tsukuyomi is instant and it only takes literally a second and it's already over and too late for the enemy.

Itachi said he was going to keep Kabuto in the Tsukuyomi world, while he controls him to get him to say the seals. That indicates it can last longer than a second.