Rukongai

Rukongai (流魂街, Wandering Soul City), also known as the Rukon District in the English Dub, is the largest portion of Soul Society and the most populated.

Overview
Rukongai 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-numbered (and farther) districts decaying into slums. Thus, while District 1 is peaceful and lawful, much like the antiseptic lifestyle of early-Edo Era Kyoto, District 80 is a hardscrabble, violent, crime-infested area that more depicts Heian era Kyoto. The duties of the Gotei 13 Divisions include defending allocated districts of Rukongai.