Originally, there are is only one way to enter this plane, this also meant that there is only one way out. This exit was permitted by Seika's variant of Kamui, which he inherited from his brother. Due to the two eyes being the only known pathways into and out of this dimension, the only way for anyone to discover this plane it to transported there, or to actually obtain Seika's eyes. However, later on during his investment in combining the efforts of the Flying Thunder God Technique and Kamui, was able to link his specific usage of flying thunder god to this dimension.