Seichiku

Seichiku (制地区, Imperial District) is the lost city of Kagawa Matayoshi, whom started building it. However, it was interrupted due to an arrancar killing him and sealing off the place.

Overview
Seichiku is where most of those previously noble families in either Soul Society or Japan live. It has many houses, similar to the whole Tokyo itself. There are certain divisions in it, judging by their ranks. each house belonging to the same division would have the same color. The lowest rank being green and the highest being red. The "rulers" are the Matayoshi Clan members due to their ancestor finding the place entirely.

Families

 * Matayoshi Clan
 * Kyoshin Clan