Kidney Punch, called Dynamite Upper (ダイナマイトアッパー/Dainamaito Appaa) in Japan, is an attack used by the Kings from the first game onwards. Its original input was f+2 while crouching. By Tekken 5, it had become WS 2. By Tekken Tag Tournament 2, it has become the first part of Round Trip Chop.