Ukemi (receiving body 受け身) also known as break falls are what uke (whoever receives the technique) does when nage (投げ thrower) or tori (取り, grabber) applies a technique.
There are many forms of ukemi:
- forward roll (zempo kaiten 前方回転受身)
- falling leaf (zempo 前受け身 or mae 前方受身)
- back (yoko 横受け身)
- side (koho 後方受け身)
- flips (tobu 飛び受け身)
All server one purpose: to escape a technique that could impart serious harm to the receiver.