Honorifics are affixes, particles and conjugations that are applied to words to mark respect. The respect is usually targeted at a certain person, which is most often the listener or a member of their in-group. Honorifics are heavily used in keigo, but are also found in polite speech and even in casual speech in smaller doses. There are also some words and expressions where honorific forms became almost automatic (お茶、御馳走様でした, etc.). Automatic honorifics (especially those prefixed by お～) and perhaps honorifics at all also tend to be more common in female speech than in male speech.
- Honorific speech in Japanese on Wikipedia