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In the series timeline, even when most everyone was younger - in the first two games - Heihachi was already balding, so this is the first time we see him with a full head of hair.
![tekken 4 final boss tekken 4 final boss](https://i.redd.it/ripjqhdpfvh11.jpg)
Parental Abandonment is actually a blessing when it comes to being Heihachi's child!
![tekken 4 final boss tekken 4 final boss](https://www.denofgeek.com/wp-content/uploads/2020/04/fighting_game_bosses_general.jpg)
As Lars leaves, he surmises that Lars will end up doing his work for him, and continues to lay low. During Scenario Campaign, his plans to take back the Zaibatsu are interrupted in their early stages when Lars shows up and confronts him, revealing that he is Heihachi's son from an affair he had in the Netherlands. Heihachi survived, being no ordinary man, but was rendered unconscious for the entirety of the 5th tournament while Jin took over the Zaibatsu. Jin foils his plan, then he gets ambushed by Jack robots, then Kazuya betrays him and the Jack robots self-destruct on him after dogpiling him. Later he found out that Kazuya was still alive, and hosts the 4th tournament to lure his descendants for his plans. Once Jin beats Ogre, Heihachi betrays Jin by shooting him in the head, only to be smacked back by Devil Jin and thrown out of Ogre's temple through a wall. When he's approached by his grandson Jin Kazama, who wants to avenge his mother's death at the hands of Ogre, Heihachi uses him to lure Ogre out. For years, Heihachi built up a good reputation with his Zaibatsu while hiding his own ambitions.