LAWS
- The ultimate law is to maintain balance.
- It is against the law for a Shinigami to give their spiritual power to Humans.
- It is against the law for a Shinigami to use forbidden Kidō.
- It is against the law for any citizen of Soul Society to create weapons of a dangerous nature not sanctioned by the feudal government. To do so is treason.
- It is against the law to attack a captain. To do so is treason.
- It is against the law to commit terrorist action(s) or attempt overthrow of the balance of Soul Society. To do so is treason.
- It is against the law to commit murder.
- It is against the law to kill a Human that a Shinigami has not been ordered to kill.
- It is forbidden for a Shinigami to acquire or attempt to gain Hollow-like powers.
- It is a crime for a Shinigami to remain in the Human World longer than a certain time limit.
- It is against the law for the Gotei 13 to meddle in the affairs of the noble families unless the family in question breaks one of the laws of Soul Society beyond a shadow of a doubt.
- It is by ancient law that two Shinigami cannot hold the same Zanpakutō. They must fight for the honor of bearing the spirit, with the spirit going to the winner, and the loser being executed.
- It is forbidden for a Shinigami to intervene in anything that is related to Hell.
PUNISHMENT
- Exile: Certain crimes allows for the punishment of exile, commonly stripping a Shinigami of their powers and banishing them to the Human World.
- Detention: A punishment not well known among the citizens of Soul Society is the detention of Shinigami. It is commonly reserved for those who have either broken the law, quit the Gotei 13 or those who just seem dangerous and mentally unstable (as per the government's interpretation). This is carried out by the Onmitsukidō.
- Imprisonment: The Central 46 can sentence a Shinigami to be held in an underground prison for a set amount of time. The prison has eight levels, which prisoners are confined in based on the severity of their crimes. For the use of forbidden Kidō techniques, Tessai Tsukabishi was sentenced to be confined in the Shugo, the 3rd level of the prison. For the crime of treason, Sōsuke Aizen was sentenced to be imprisoned in the 8th level, called Muken.
- Spirit-sealing pit: The spirit-sealing pit is an ancient form of execution in which Shinigami criminals are thrown into a pit walled with sekki sekki rock – a type of stone that absorbs spiritual power, preventing those nearby from using their powers. Hollows are then thrown into the pit with the criminals as the means of execution. The practice was considered too barbaric and discontinued.
- Sōkyoku (双殛): The "ultimate punishment", Sōkyoku is a form of execution usually reserved for those with extremely strong spiritual powers, namely Shinigami captains. The Sōkyoku is a giant halberd that utterly destroys a soul on contact. When released, Sōkyoku takes on the form of a phoenix, its true form, called Kikōō. The Kikōō has the destructive power of a million Zanpakutō, and that power is multiplied by a factor of 10 at the moment it pierces its victim. It was destroyed by Jūshirō Ukitake and Shunsui Kyōraku.