Kazuhiko watches Vex wield his sword with form motioning a sweeping stroke with the sword. He takes a few steps back out of range of Vex's attack. He takes a closer look studying the lethal strike and keen on the way Vex handle the sword.
"He is wielding the sword one-handily and flings the sword with physical power. In this particular motion, the weight of his body is drawn into the sword. He has no time to respond. This is my chance...!!!" Kazuhiko thought while taking a quick analysis.
Kazuhiko entered a time perceptive where his mind is unaffected by the outside world - seeming much slower than what others may perceive, which permitted him to make quick judgement and action to attacking Vex. He enter the time perceptive the moment he step back and begin watching Vex's movement. As Vex blade lean farther upward to the right (Kazuhiko's left abdomen and chest) - leaving no leeway to adjust his sword for a proper counter - Kazhiko shift his movements to the left of Vex (placing weight on his left-foot and then transferring the weight to the right); swiftly side-stepping and then charging. Holding his single kunia knife in his right-hand (placing the blade up to shoulder length, crossing-over to his right), he jolts towards Vex's slashing his left shoulder, minor wounding it.
"First Blood!!?"
A gruesome grin shows on Kazuhiko's face.