Detached Existial Dimension is a special dimension created by Seireitou Hyuga in order to train using Zenkai and many othe rthings without harming the outer existance. This realm lies separate from all of existance, making a "second" existance that has no affect on the true one. Seireiotu made this form using the maximum powers of his Kitsune powers.
The scenary of this land is like the Other World. A pinkish sky with lush grass around that goes on and on. In the area, there exists a house, stuffed with food and living neccessarities.