Tettsui Komekami Uchi is a striking technique used in Kyokushin karate. It translates to 'Hammer Fist Strike to the Temple.' In this technique, the practitioner delivers a powerful hammer fist strike to the opponent's temple (komekami) using the bottom of the fist (tettsui). The strike is executed with speed, precision, and force, aiming to target a vital area on the opponent's head. Tettsui Komekami Uchi can be used in various situations, such as in self-defense or during close combat scenarios. Proper execution of this technique involves generating power from the entire body, including the legs and hips, and transferring it through the torso and arm to deliver a devastating strike. Practitioners train in Tettsui Komekami Uchi to develop accuracy, timing, and the ability to deliver effective strikes in high-pressure situations.