In the black-and-white Tsukuyomi Space.
Since this was essentially a mental space, as long as Naruto Uzumaki wished it, the sealed water prison within his body could appear.
An enormous water prison appeared within the Tsukuyomi Space. The Nine-Tails' illusory form flickered in and out within it. It raised its head and looked around, its face clearly displeased. "Is this... the Uchiha Clan's ocular technique space?"
"Kurama... long time no see!"
Joy gradually appeared on Naruto Uzumaki's face, though tears still dripped down his cheeks. This Tailed Beast had accompanied him throughout his life.
After he had grown old and frail, the Nine-Tails had still desperately tried to extend his life, never even considering its own future.
The massive demon fox phantom gripped the cage and lowered its voice. "Kid, how do you know my name? Who told you? Wait... your spiritual energy..."
That shouldn't be possible!
In the Nine-Tails' understanding, Naruto Uzumaki should have merely been a kid. Yet in this Tsukuyomi Space, Naruto Uzumaki's body was actually even larger than its own!
How could something like this be possible?
"Your size is much smaller..."
Naruto Uzumaki stretched out a hand and covered the cage. "Is it because there's only the Yang Nine-Tails' chakra now? Right, the Yin Nine-Tails is still inside Dad..."
The massive demon fox bared its fangs and stared at Naruto Uzumaki. "Kid, how do you know about that too?"
Twelve years ago, the Nine-Tails had run rampant.
The Fourth Hokage, Minato Namikaze, had used the Reaper Death Seal to split the Nine-Tails in two. Only half of the Nine-Tails' chakra remained within Naruto Uzumaki, also known as the Yang Nine-Tails.
The other half of the Nine-Tails' chakra, the Yin Nine-Tails, had been taken by Minato into the Reaper's belly along with the Reaper Death Seal.