Kijikūken

 is a ninjutsu employed and created by Sayotsu. This technique can essentially slash through the dimension of time and destroy anything occupying the said point in time and alter history itself by destroying certain objects, people, etc. Since the attack will strike at all temporal locations, this ensures a successful hit at a time when the target is vulnerable (i.e. before acquiring intangibility or immortality). By cutting open the time-space itself, Sayotsu can either open up a portal to travel through time, or control the speed of time depending on the cut's properties, such as severing the time's flow to stop it or slice a frozen time-stream to return it to normal. By removing or displacing a slit of space, this will cause a rip within the spatial area, and anything occupying that area will suffer the cut as well. Since this is a spatial attack that attacks the very third dimension, there is no defense against it. Since the spatial blades appear instantly, there would be no time lag, making evasion very difficult. The exact mechanisms of this technique remains unexplained. It was used only once, to restore future and save Earth itself from destroying and the single usage caused Sayotsu to collapse and nearly die.