Gankiryu [upd] -

Osu.

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. gankiryu

It sounds like myth. Until you meet someone who has it. Then you realize: The eyes aren't the window to the soul. They are the trigger for the body. gankiryu