What is Uratori?
“Uratori” (Counter techniques) are used to counter an opponent’s Waza, whereby he is toppled instead of you. More than a defensive maneuver, an Uratori is a technique that turns an urgent situation into an opportunity.
For example, if Uke attacks with an Osoto-gari (Large outer reap), Tori can step back with one leg and back away from Uke. Tori then shifts his center of gravity to that back leg (now his support leg) and twists his body to destabilize Uke in the backward direction, and then executes his own Osoto-gari.
Uratori allows a combatant to execute a counter maneuver at the instant he is attacked, and is one of the more interesting aspects of Judo.