Area 28

Area 28 is an area of sewers under Kagutsuchi and close to Lost Town, the NOL have been known to dump most of their waste around Area 28. Arakune spends most of his time around Area 28, when not looking for beings to devour. It is the area with the heaviest seithr concentration hence, why Arakune chose to habitate in this location rather then the higher levels of Kagutsuchi.

It is possibly due to the high amount of seithr that the Kaka Clan cannot reproduce beyond one-hundred members. But at this time it is speculation at best since normal humans cannot survive large amounts of seithr.