Riku is a formidable swordsman, but he does not possess enough speed to take Kanda down for the count. Kanda may not be the strongest swordsman around, but he is still impressive. Riku has a larger array of magic at his disposal, but it wont be able to overcome Kanda’s raw speed. Kanda is a true warrior and this is just another step on his journey to become the best! Kanda wins.