He is a main character in the Tekken series.
Kazuya Mishima has been featured in every Tekken game except Tekken 3. Kazuya Mishima is the son of Heihachi Mishima and Kazumi Mishima, the grandson of Jinpachi Mishima, the father of Jin Kazama (due to an unexplained relationship with Jun Kazama. He is also the half-brother of Lars Alexandersson and the adopted brother of Lee Chaolan, who Kazuya never liked and shares an intense rivalry with.