Rukongai

also known as the Rukon District in the English Dub, is the largest portion of Soul Society and the most populated. It is divided into 320 districts (80 in North Rukongai, 80 in West Rukongai, etc.), each numbered in descending order on how far they are from the center; this results in the higher-numerated (and farther) districts decaying into slums.
Moderator: Nokutisu Shikyo

Seireitei

in the center of Soul Society, a circular shiro with four main entrances, ten days apart, each guarded by a Gate Guardian. The walls of Seireitei are made of stone called Sekkiseki.
Moderator: Nokutisu Shikyo