Observation Haki, also known as Kenbunshoku Haki, is a form of Haki in the One Piece anime and manga series. It allows the user to sense the presence of others and predict their future actions by foreknowledge. However, it cannot read the mind of the opponent in the sense of their internal monologue or thoughts, but only pick up their actions. The person being observed must be in a state of awareness and thinking for Observation Haki to work. The user of Observation Haki can only know the future from the point of view that they do not intervene, and it appears to favor evasive moves rather than offensive maneuvers. Observation Haki is used sequentially, meaning that the user initially uses it, then decides to attack or defend depending on what is gleaned, uses Observation again, and so on. The ability to use Observation Haki is innate in everyone, but few manage to awaken it. Some characters in the One Piece series who are known to possess strong Observation Haki include Usopp, Koby, and Sanji.