is one of the original 40 throws

Throw (grappling)

A throw is a martial arts term for a grappling technique that involves off-balancing or lifting an opponent, and tossing them to the ground in Japanese martial arts referred to as nage-waza, 投げ技, "throwing technique"...

 of Judo

Judo

is a modern martial art and combat sport created in Japan in 1882 by Jigoro Kano. Its most prominent feature is its competitive element, where the object is to either throw or takedown one's opponent to the ground, immobilize or otherwise subdue one's opponent with a grappling maneuver, or force an...

as developed by Jigoro Kano.
It belongs to the fifth group,
Gokyo, of the traditional throwing list,
Gokyo (no waza), of Kodokan Judo.
It is also part of the current 67 Throws of Kodokan Judo.
It is classified as a side sacrifice technique,
Yoko-sutemi

Judo technique

This page is a list of judo techniques. There are a variety of techniques recognized by Kodokan judo and other budō . Below is a partial list, organized by technique type and alphabetically within type....

.

Technique description

The person performing the technique (tori) pushes his opponent (uke) until uke resists and pushes back. At the moment of maximum forward push by uke, tori falls quickly to the mat directly in front of, close to, and perpendicular to the feet of uke. While dropping, tori rotates his body to pull uke over him and to the ground. As a sacrifice throw, tori is putting himself into a vulnerable position on the mat so the timing must be such that uke is quickly thrown over tori and has no chance to drop down onto tori.

Included systems

Systems:

• Kodokan
  Kodokan
  , or the Kodokan Institute, is the headquarters of the worldwide judo community. Literally, kō means "to lecture" or "to spread information," dō means "the way," and kan is "a public building or hall," together translating roughly as "a place for the study or promotion of the way." The Kodokan was...
  
   Judo
  Judo
  is a modern martial art and combat sport created in Japan in 1882 by Jigoro Kano. Its most prominent feature is its competitive element, where the object is to either throw or takedown one's opponent to the ground, immobilize or otherwise subdue one's opponent with a grappling maneuver, or force an...
  
  , Judo Lists

Lists:

• The Canon Of Judo
• Judo technique
  Judo technique
  This page is a list of judo techniques. There are a variety of techniques recognized by Kodokan judo and other budō . Below is a partial list, organized by technique type and alphabetically within type....
  
  

Ude Gaeshi

Ude Gaeshi is considered to be a variation of Yoko Wakare.
http://www.judo.union.shef.ac.uk/nage.html
It is demonstrated by Kyuzo Mifune in
The Essence of Judo
and described in The Canon Of Judo.