Hyōkaidō

Hyōukai Cave (兵庫洞窟, Hyōgo dōkutsu, Literally meaning:Block of ice Cave) is one of the big three unexplored sage regions, a legendary place that is equally famous as the others, Hyōkai Labrinyth and Majonomori Forest. It is the residence of the arctic foxes — including the sacred The Nine Tailed Sage that resides in the cave and currently rules the entirety of the Arctic Foxes— and is also where Tenji Shirogitsune trained here to achieve Sage Mode, though only the latter was successful in this endeavour. Unlike the other sages, the foxes of Hyōukai Cave seem to have more affiliations across the globe showing they is a universal species, despite at least four of their summoners originating from the Hyōkaigakure. Also, three of their foxes seemed to show great intelligence that earned them a seat in the Hyōkaigakure Council.

Overview
From Konohagakure its three week journey to reach the cave this can also can take longer from other villages except Sunagakure since its the 2nd closest village to the land of brine but within the land Hyōkaigakure is the closest to Hyōukai Cave only taking two days to reach it, the foxes of Hyōukai Cave take precautions so that only those who are deliberately trying to visit it can arrive at it. In their experience, only those with sheer determination and a iron will can come to Hyōukai Cave. In order to be granted audience to learn senjutsu with the fox sage, one must pass three trials posed by the foxes. According to the rules, if a candidate fails at any of the trials, the foxes are allowed to kill or keep them as their slave or sex slave. one section of the cave is made of dolomite, the surface being mostly covered by the castle it is also seen covered with gems of different variets, the sage's chamber or Fox Nest its littered with Gypsum and Rubies, its territories also include fenlands.

Inhabitants

 * The Nine Tailed Sage
 * Amakaze Shirogitsune
 * Tesshin Hyūga
 * Kohakuiro
 * Kyouto (Rogue)
 * Kokyū
 * Mugibatake

Known Summoners

 * Tenji Shirogitsune