Concealment in Samehada is an ability available to Kisame Hoshigaki after fully merging with the Samehada sword. In this state, he can hide inside the blade itself, becoming one with it. Since Kisame's and Samehada's chakra is identical, even experienced sensors cannot detect his presence. This allows him to move unnoticed, hidden in the sword, which can be carried by an unsuspecting opponent. It was in this way that Kisame infiltrated the lands of the Cloud, staging his own death and hiding inside Samehada, which Killer Bee took.
