As a samurai, Saito knew to the basics close Quarters combat. it was simply react, counter, finish. So when his opponent reacted to his attack by cleverly defending against by blowing back his blade as he blocked His strike, he could instinctively expect a counter attack following it. Now was the time for Saito to react to make sure he continues to stay on top of the battle.
Using the force of the blow back of His katana being blocked by his opponent, Saito used the momentum to quickly go into a backwards roll to avoid the following downward strike by escaping the reach of the opponent's sword. after springing back to his feet, Saito quickly sheath's his katana before positioning his left hand to hover over the handle of the katana and the right hand gripping the scabbard with that hand's thumb slightly pushing up against the tsuba. Before the opponent can recover from the downward slash, Saito quickly darts to the opponent, while pushing against the Tsuba to release the lock of the scabbard and drawing the katana and slashing horizontally all in one motion in lightning fast speeds cutting the opponent before he can react.
Saito: witness the speed and power of my Iado!