Chudan Haito Uchi is a technique in Kyokushin karate. It translates to 'Middle-Level Ridge-Hand Strike.' This technique involves striking with the ridge of the hand (haito) targeting the opponent's midsection or torso. The term 'Chudan' refers to the middle level, and 'Haito Uchi' denotes the ridge-hand strike. It is commonly used to deliver powerful and precise strikes to vulnerable areas such as the solar plexus, ribs, or abdomen.