Tachiai — Initial Charge
Tachiai (立ち合い) is the initial charge that begins a sumo bout. Both wrestlers crouch at the shikiri-sen (starting lines) and must touch both fists to the clay before launching forward simultaneously.
The rules require both wrestlers to have both fists on the ground and to charge at the same moment. If one wrestler jumps the start (matta), the bout is restarted. A powerful, well-timed tachiai can immediately put an opponent at a severe disadvantage, while a poor tachiai often leads to defeat even for technically superior wrestlers.
Developing an effective tachiai is considered one of the most important skills in sumo. Timing, explosive power from the legs, and psychological focus all contribute. Legends like Chiyonofuji were renowned for their ferocious tachiai that could immediately throw opponents off-balance.