falling techniques
Sumo term referring to techniques for falling safely or breaking a fall, often practiced during training.
相撲部では、まず反り手の練習から始める。
In the sumo club, we start with practicing falling techniques.
Compound of 反り (sori, 'bending backward') + 手 (te, 'technique'). The exact derivation is uncertain; the term is specific to sumo.