Being in Kijin state applies the following effects:

Increases max HP by 100%

Nullifies debuffs

Nullifies Unison gauge reduction effects

Boosts critical hit Ability Power by 50

Increases attack Ability accuracy by 30%

Permits piercing through damage reduction/reflection effects when attacking

Permits piercing through damage nullifying effects when attacking

*1. There is a limit to the amount that max HP can be increased.
*2. The "increases max HP by 100%" effect is separate from other regular buff effects of the same name and cannot be removed by buff removal effects.
*3. Some of the effects received can be removed by Abilities and Unison Attacks that have special buff-removing effects.