Isle of Rankings
A mysterious island with its own consciousness, located in the tropical seas. It reads the subconscious minds of those who visit, causing their thoughts to manifest, and attaches arbitrary rankings to them.
After Jin Kisaragi's first visit to the island, his thoughts of Ragna the Bloodedge had multiplied out of control and, thus, Jin gave it the name of "Brotherly Paradise". In Celica's First Errand story, Bang Shishigami is seen sailing a boat to the island and takes Jin with him as part of Makoto Nanaya's backup plans.