In more advanced training, uke may apply reversal techniques (返し技, kaeshi-waza) to regain balance and pin or throw tori.
Good ukemi involves attention to the technique, the partner and the immediate environment - it is an active rather than a passive "receiving" of Aikido.
The fall itself is part of Aikido, and is a way for the practitioner to receive, safely, what would otherwise be a devastating strike or throw (or joint lock control) and return to a standing position in one fluid movement.
The person throwing (or applying other technique) must take into account the ukemi ability of his partner, as well as the physical space: walls, weapons (wooden tantō, bokken, jō) on the tatami, and the aikido practitioners nearby.
Many of the strikes (打ち, uchi) of aikido are often said to resemble cuts from a sword or other grasped object, which indicates its origins in techniques intended for armed combat.
[citation needed] Many aikido techniques derive from Daitō-ryū Aiki-jūjutsu, but some others were invented by Morihei Ueshiba.
Different types of kokyū-nage may include: Aikido makes use of body movement (tai sabaki) to blend with uke.
[11] Additionally, an "inside" (内, uchi) technique takes place in front of uke, whereas an "outside" (外, soto) technique takes place to his side; a "front" (表, omote) technique is applied with motion to the front of uke, and a "rear" (裏, ura) version is applied with motion towards the rear of uke, usually by incorporating a turning or pivoting motion.
The target may also become unbalanced in attempting to avoid the blow, for example by jerking the head back, which may allow for an easier throw.