Turn your whole body to the right and swing the jo in a sweeping strike
to the rear. The right foot will sweep back as the jo finishes behind you.
Tips:
"From Hasso-no-kamae turn the body, take a large sweeping step with the
right foot, and make a sweeping strike." Morihiro Saito, Traditional Aikido Volume 1, 1973.
Your right index finger should be behind the jo during the final
strike so that the final strike to the rear is strong.