Sumi otoshi video
Info about "Sumi otoshi video"
Sumi otoshi (corner drop), is one of the original 40 throws of Judo 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 hand technique, Te-waza. 
Sumi Otoshi is accomplished by Tori stepping his left foot (or right foot) beside Uke’s right foot (or left foot). Using his body movement and both hands Tori puts Uke off balance to his right backward (or left backward). Then, Tori pushes Uke up and throws down or similar to this type of techniques. 
[1 From wikipedia.org]
[2 From kodokan.org]