From Tekken Zaibatsu Wiki
During The King of Iron Fist Tournament 5, Bruce reunited with Kazuya Mishima and aided him in his plot to take over the G Corporation. The G Corporation, controlled by Kazuya behind the scenes, began a war with the Mishima Zaibatsu. As the leader of a private force reporting to Kazuya, Bruce traveled the globe, eliminating Mishima Zaibatsu operatives.
When Kazuya?s plan to destroy the Mishima Zaibatsu began, the G Corporation put a bounty on Jin Kazama's head. Then, just as expected, the Mishima Zaibatsu made its move and announced The King of Iron Fist Tournament 6. In spite of the obvious ambush that awaited him, Bruce entered the tournament for a chance to capture Jin and the reward.