Kazuya is one of the main characters in the Tekken series, consistently appearing in the lineup for every game except Tekken 3. Heihachi, his father, decided to test his son's worth by throwing Kazuya off a cliff. Kazuya deeply resents him for this. He is also the father of Jin Kazama. Although Kazuya started out as a cookie-cutter hero, he has since developed into one of the series' main villains.