Haisoku Gedan Mawashi Geri is a technique in Kyokushin karate. It translates to 'Inside Foot Low Roundhouse Kick.' This technique involves executing a roundhouse kick with the inside edge of the foot to target the opponent's lower body. The term 'Haisoku' refers to the inside edge of the foot, 'Gedan' indicates the low level, 'Mawashi' means roundhouse, and 'Geri' refers to the kick. It is commonly used to target the opponent's thigh, knee, or lower leg with speed and precision.