Mishima Zaibatsu is an evil organization in Tekken series. Every winners of The King Of Iron Fist Tournament, will be crowned as the new owner.
Mishima Zaibatsu or Tekken Zaibatsu (name changed after Jinpachi Mishima lost the Zaibatsu to his son), it was owned originally by Jinpachi, but the Zaibatsu was taken over by Heihachi, who has run the company for over 40 years, except for two brief interims. The companies grouped together in the syndicate include the Mishima Financial Empire, the mercenary group known as Tekken Force, and Mishima Industries. The Mishima Zaibatsu is the main sponsor of The King of Iron Fist Tournaments, the central events of the video games. In Tekken 5, Jinpachi Mishima regained control of the Mishima Zaibatsu. However, Jinpachi was defeated by Jin Kazama during The King of Iron Fist Tournament 5, and Jin gained control of the Zaibatsu in order to find a cure for his Devil Gene. Jin declared the Mishima Zaibatsu’s independence and waged war against the rest of the world to destroy an even greater evil capable of destroying the world.
The Mishima Zaibatsu swept across the globe, taking over nation after nation. But as the war continued, new opposing forces slowly began to show their presence. Jin learned that Kazuya Mishima was controlling the first and most powerful opposition, the G Corporation. When the G Corporation placed a price on his head, Jin announced The King of Iron Fist Tournament 6, as if he had been waiting for the G Corporation to make its move.
However in the Scenario Campaign mode it is revealed that the war and tournament was just to fill the world with enough negative energy to make the physical form of the evil entity known as Azazel, because Kazuya and Jin are known as the "Two Evil Stars".
- Jinpachi Mishima -Founder and leader of Mishima Zaibatsu until Heihachi overthrow him. Becomes leader again in Tekken 5.
- Heihachi Mishima -leader in Tekken, Tekken 3, Tekken 4, and Tekken 7.
- Kazuya Mishima/Devil - leader in Tekken 2
- Jin Kazama / Devil Jin: CEO in Tekken 6: After defeated Jinpachi in the King of Iron Fist Tournament 5, he takes over the Mishima Zaibatsu and declared a war against the rest of world in order to destroy the world and filling it with negative energy. He also opened the King of Iron Fist Tournament 6 in order to kill Kazuya Mishima and crush his organization (G Corporation).
- Nina Williams: She recruited by Jin to be his bodyguard and assist his Tekken Force in taking over the world. With strong tension between the Mishima Zaibatsu and G Corporation, the King of the Iron Fist Tournament 6 was announced. In order to remove any threats to the life of Jin Kazama, Nina enters the tournament.
- Eddy Gordo: Eddy was failed to win the King of Iron Fist Tournament 5. He spoke alone with Jin. Jin offered to lend him his money and resources to save his master's life. If Eddy joined the Tekken Force, he promised to find a cure for Eddy's master's illness. Eddy joins the Tekken Force, and he is involved with a number of criminal operations just as The King of Iron Fist Tournament 6 approaches.
- Alisa Bosconovitch: Alisa's journey begins when a man named Lars awakens her out of cryosleep. Suddenly, G Corporation's Jack-6 robots attack both Alisa and Lars. Alisa retaliates by using her chainsaws to saw off a JACK robot. Then, later in the game mode, they meet Lee Chaolan who is the foster brother of Lars Alexandersson. Lee is against Kazuya Mishima and G Corporation, just like Lars and Alisa. Near the end, it is revealed that Alisa was built to protect Jin Kazama. Alisa betrays Lars and later a big battle occurs, Lars then fights Jin Kazama. His nephew explains about the chaos he started around the world. It was a theory by a woman named Zafina. She said that Jin Kazama and Kazuya Mishima are the two evil stars of the Devil Gene to awaken Azazel. They both came into combat contact, awakening his spirit. He said that he must put an end to the Mishima Bloodline and save the world from Azazel's existence. Suddenly, Golden Azazel emerges in front of Lars and Jin.
- Dr. Abel - Rival of Dr. Bosconovitch.
- Ganryu-in Tekken and Tekken 2.
- Kuma- in Tekken,Tekken 3, and Tekken 4 being Heihachi's pet.
- Lee Chaolan- in Tekken and Tekken 2.
- Bruce Irvin-in Tekken 2.
- Anna Williams -in Tekken 2.
- Dr. Bosconovitch: He was a scientist in Mishima Zaibatsu. He built Alisa Bosconovitch as his deceased beloved daughter. He programmed in Alisa's system to search her father and serve Jin Kazama.