Overthrow

 

With this move, the practitioner takes the opponent's arm and lowers his own body while pulling and choking at the base of the opponent's neck, lifting him onto his back and throwing him.

Similar moves can be observed in other styles in Judo, but what distinguishes it in the Hazuki Style is that the opponent is not released during the throw. Because the opponent's neck is grasped with both hands and the throw is executed while choking, the opponent cannot assume a defensive posture and is flipped completely upside down when falling. In order to develop the muscles needed for the required grip, Ryo practiced by filling an earthen pot with sand and lifting it with only the tips of his fingers.

Move description/video courtesy of Suka Pass.

The Overthrow is the quintessential over-the-shoulder throw seen in various grappling arts and movies since motion pictures were invented. Judo is the most famous for its seoi nage (背負い投げ) shoulder throw and many variations of it are still regularly used in competition today.

Masashi Ebinuma (JPN) vs Antoine BOUCHARD (CAN) at the Budapest Grand Prix 2018

It is somewhat rare in modern MMA, but standing and drop versions do appear occassionally.

Former Olympic judoka Rick Hawn using a seoi nage in one of his MMA fights

Is Ryo gonna have to choke a bitch mad angel?

The description mentions choking the opponent with two hands while throwing them. There is a historical analogue in classical jiujitsu called ganseki nage or ganseki otoshi (boulder throw/boulder drop). A cross-armed double lapel grip on a gi or kimono is commonly used for strangling techniques in jiujitsu and judo. While these chokes are usually applied during newaza ground-fighting in the modern era, applying these chokes while standing was more common historically. Using this choking grip, the user can throw the user over their shoulder, either for the surprise factor or if the choke is being defended. The ganseki otoshi eventually morphed into the shoulder throw of today, but one can still find it listed as a "reference technique" in sources like Kyuzo Mifune "The Canon of Judo."

From "The Canon of Judo"
Top: the ganseki otoshi in action
Bottom: the cross arm grip used to strangle during newaza

Grip Training

Hojo undō (補助運動), or supplementary exercises, refers to traditional physical conditioning exercises done with and without weighted equipment. It is most commonly associated with Okinawan styles of karate. The earthen pots of sand that Ryo lifted are called nigiri gami and are common hojo undō tools.

From Michael Clarke's "The Art of Hojo Undo: Power Training for Traditional Karate"