The King of Iron Fist Tournament 5 came to a close. The final battle was between the sponsor of the tournament, Jinpachi Mishima, and Jin Kazama. Jin Kazama came away as the victor.

Becoming the president of the Mishima Zaibatsu, Jin immediately began various programs within the company and converted the Tekken Force into a spy project. People began to suspect a darkness in Jin, leading to increased tension, infighting, and finally a full-scale war. The whole world was drawn in, and when the nations began losing power, the Zaibatsu, able to gain a profit from the potential of war, announced its independence and declared war on the entire world.

Initially, the Mishima Zaibatsu was a formidable enemy, but then G Corporation rose to the position of the main opposition to the Zaibatsu. The world saw the rival company as the savior, and endorsed them completely in their drive to suppress the Zaibatsu. Eventually, G Corporation announced that the president of the Mishima Zaibatsu was the root cause of the war, and promises an immense amount of money to anyone who can capture Jin Kazama alive. G Corporation's current chairman and CEO, Kazuya Mishima, took over the company after killing all those within it who betrayed him just before The King of Iron Fist Tournament 5.

Now, fighters from all over the world choose sides between the Mishima Zaibatsu and G Corporation. Some stand behind the Zaibatsu, others behind G Corporation. Still others form a resistance to both, fearing the results if either one wins. And some seek only profit in all of the chaos. With the whole world at war, there has never been a better time for a master of battle to make a name for himself.