Shikai

Shikai (始解, Initial Release) is the second form (or first upgraded form) available to a Zanpakutō. To activate it, the Shinigami needs to learn the name of their Zanpakutō. This is not as easy as simply picking a name, for the living spirit of the Zanpakutō already has its own name. The Shinigami must be able to communicate and harmonize with their Zanpakutō effectively, which requires being able to speak to the spirit within its world.

The blade changes shape and gains special abilities by chanting a Kaigo, or release incantation. Using the Kaigo, followed by the name of the Zanpakutō, activates Shikai. It is crucial to memorize each phrase, for every Zanpakutō has a different incantation.

The commands vary between users and range from a simple imperative verb to a short poem. They often relate to the Zanpakutō's signature ability or hint at the nature of its spirit. This step may be bypassed by expert Shinigami who have learned how to use their Bankai. undefined Occasionally, Shinigami who did not learn Bankai can release their Zanpakutō simply by saying its name.

Achievement of the Shikai is a mark of control of a Zanpakutō, and it is a requirement for advancement within the Shinigami ranks, for most seated officers are capable of Shikai. It is required in order to achieve the rank of lieutenant, for it is a requirement which most captains look for.