Those permitted to live in the tranquility of the Seireitei are Shinigami and the Noble Houses. What is known is that in the center of the Seireitei is a white tower known as the Senzaikyū, where criminals are imprisoned on the hill adjacent to it is the Sōkyoku, where prisoners are executed. Information about the Seireitei is confidential. When it is not down protecting the Seireitei, the wall protects the Soul King Palace, located in an inner dimension. The wall that surrounds the Seireitei is commonly held up, only closing down when there is an emergency. The stone also forms a spherical barrier around the city, extending above and below, stopping anything spiritual from breaching it from ground level, from the sky or from underground. The walls of the Seireitei, known as the Seireiheki (瀞霊壁, Pure Soul Wall), are made of Sekkiseki (殺気石, Spirit Reducing Stone), a rare type of stone known to negate all Reiryoku, similar to magnetic lodestones. There are, however, doors within the gates, to allow passage of individuals when needed, such as when Momo Hinamori first entered the Shin'ō Academy. The gates are so heavy that it takes the full might of Jidanbō Ikkanzaka to lift one, while during the Bount-led attack on Seireitei, siege machines were needed to open the gates. These gates are collectively called theįour Great Pure Soul Gates (四大瀞霊門, Shidai Seireimon): these gates are made up of the Northern Black Ridge Gate (黒隆門, Kokuryōmon), the Eastern Blue Stream Gate (青流門, Shōryūmon), the Southern Red Hollow Gate (朱洼門, Shuwaimon), and the Western White Way Gate (白道門, Hakutōmon Viz ' White Road Gate').

Seireitei is a circular shiro with four main entrances, ten days walk apart, each guarded by one of the Gatekeepers.

Ranks of soul reapers in bleach