Instant Regeneration is a ability that only those with the unknown clans Kekkei Genkai, Immortality. The regeneration itself is automatic regardless of if the user wishes to regenerate, or the amount of chakra the user has. It can regenerate any and all damage done to the user instantly. This also carries into diseases and illnesses, toxins or poisons, or even random foreign substances such as Sake, even a sugar rushes are impossible.