Abridged move description courtesy of Suka Pass:
This throwing move involves quickly turning and pulling the opponent's neck, then using the leg to sweep up the opponent's inner thigh and throw him.
In Judo, this move is called the Inner Thigh or the Sweep Throw depending on the area of the opponent's body that is targeted, but in the Hazuki Style, the move carries the single name, the Sweep Throw. It can be said that of all the throwing moves of the Hazuki style, which has carefully preserved the nature of the fighting moves of the Warring States Era, that the primary aim is to flip over and drop the enemy rather than throw him a great distance. This is certainly true of the Sweep Throw.
The effectiveness of Jujitsu throws is best demonstrated when the opponent is thrown onto hard ground or a floor rather than on straw mats, at which time, more damage can be imparted to the opponent's entire body than with a simple thrust or kick.
The Sweep Throw does exist in judo and is known as uchi mata (内股) which translates to "inner thigh". The Sweep Throw mentioned in description most likely refers to harai goshi (払腰) which translates to "sweeping hip". Uchi mata is nicknamed "the king of throws" and is one of the moves with the highest percentage of successful use in competition.
While uchi mata/sweep throw is nowhere near as common in MMA as it is in judo, it has been used before at the highest levels of the sport. It is typically used as a counter in MMA, as the opponent driving forward provides part of the setup of the move. This could be used in response to an outside trip attempt:
Former Bellator champion/Olympian Ben Askren gets tossed by Luis Santos as he attempts an outside trip after a failed bodylock takedown.
Islam Makhachev throws Nik Lentz while up against the fence after Lentz tries to use an outside trip
It can also be used to counter forward pressure from an over-under clinch or single leg attempt:
Ricardo Lamas throws Charles Oliveira as Oliveira pressures Lamas into the fence from the clinch
Hall of Famer Ronda Rousey demonstrates both setups in her second match against Miesha Tate.
While the tidbit in the description regarding hard surfaces being worse than soft ones to land on is sort of a "no-duh" moment, there is some historical precedent. In the famous match between Brazilian jiujitsu founder Hélio Gracie and top judoka Masahiko Kimura, Kimura threw Gracie multiple times but was unable to stop Gracie with throws alone due to the soft mats used in the arena.
Kimura pinning Gracie in a kesa gatame (scarf hold) during the legendary match.
