At its simplest level, Gankiryū is the study of Metsuke (目付け)—the use of the eyes in combat. But that is like saying the ocean is "a little bit of water."
Osu.
The core premise is radical: The Three Levels of the Gaze In the Gankiryū method, looking at your opponent is not passive. It is an active weapon. Practitioners break the gaze down into three escalating levels: gankiryu
The beginner’s level. You look at the opponent’s sword tip, their hands, or their shoulders. The problem? This tells the opponent exactly where you are going to attack. In Yagyū lore, this is called "the gaze of the sparrow"—easily caught by the hawk. At its simplest level, Gankiryū is the study
The intermediate level. You look at the opponent’s eyes . This is the classic "death gaze." By locking eyes, you attempt to read their intent. Did their pupil dilate? Did their focus shift to your left side? This is a duel of wills, but it is still a battle. It requires energy. It is an active weapon
But what if I told you that some of the most devastating techniques in classical Japanese martial arts don’t start with the body at all?
They start with the eyes .