Tawara Gaeshi (俵返) is one of the preserved throwing techniques, Habukareta Waza, of Judo.
It belonged to the fourth group, Dai Yonkyo, of the 1895 Gokyo no Waza lists.
[1] It is categorized as a rear sacrifice technique, Ma-sutemi.
As the opponent attempts Morote gari, the defender goes over the shoulders and arms and locks his/her opponents body.
The defender, while still holding the body lock tightly, then drops his/her weight down and backwards and uses the leverage from the body lock to fling the opponent behind the defender onto the opponents backside in one fluid motion.