You may look at this in a movie or a game, or may have heard it. It is the mystic words for the ninja and Japanese Sorcery to defeat apparition or creature, or protecting the body. And it is one of the magic words that are called "Shingon" in esoteric Buddhism. "Kuji" is a meaning of "Nine Chinese characters". "Goshin" is a meaning of "own body is defended". "Hou" is a meaning of "method". That is, mystic words of nine Chinese characters which protect oneself.