Jin Kazama has turned evil. It was inevitable, even if it seemed unlikely. You'd never think he'd actually go through with it - he's practically a saint compared to some of the other characters - but the temptation was too great. Jin has taken control of the Mishima Zaibatsu, but he's not interested in using it for the sake of justice or peace. Instead, he used the corporation to build an unbeatable army and intends to conquer the world with it. He's accomplished more than any of his predecessors; not even previous owners/villains Heihachi or Kazuya have shown this kind of ambition and lust for power. It's kind of ironic, in a way.