On May 3, 2010, at Wrestling Dontaku 2010 Nagata and Wataru Inoue defeated No Limit (Tetsuya Naito and Yujiro Takahashi) and Bad Intentions (Giant Bernard and Karl Anderson) in a three-way match to win the IWGP Tag Team Championship. On June 19 at Dominion 6.19, Nagata and Inoue lost the Tag Team Championship to Bernard and Anderson in a three-way elimination match, which also included No Limit. In September Mitsushide Hirasawa left for a learning excursion to Puerto Rico and his spot in Seigigun was given to newcomer King Fale. On October 22, 2010, Nagata and Inoue entered the 2010 G1 Tag League. After four wins and a loss, Nagata and Inoue won their block and advanced to the semifinals of the tournament, where, on November 7, they defeated the IWGP Tag Team Champions, Giant Bernard and Karl Anderson. In the finals of the tournament Nagata and Inoue defeated Tetsuya Naito and Yujiro Takahashi to win the 2010 G1 Tag League, ten years after the first time Nagata had won the tournament. As a result of their victory, Nagata and Inoue received a shot at the IWGP Tag Team Championship on December 11, 2010, but were defeated by the defending champions, Bad Intentions. The following day Minoru Suzuki returned to New Japan and re–ignited his old feud with Nagata by attacking him after a match. On January 4, 2011, at Wrestle Kingdom V in Tokyo Dome, Nagata defeated Suzuki in a grudge match. On March 13, Nagata entered the 2011 New Japan Cup, defeating Giant Bernard in his first round match. On March 19 Nagata defeated Masato Tanaka in the semifinals of the tournament and finally, on March 20, Shinsuke Nakamura in the finals to win the 2011 New Japan Cup and become the number one contender to the IWGP Heavyweight Championship. Nagata received his shot at the IWGP Heavyweight Championship on April 3, but was defeated by the defending champion, Hiroshi Tanahashi. The following week Nagata entered All Japan Pro Wrestling's 2011 Champion Carnival and on April 13, defeated Seiya Sanada in the finals to win the tournament, becoming only the fourth man to have won both the Champion Carnival and G1 Climax tournaments. On June 18, Seigigun member Mitsuhide Hirasawa, now working under the ring name Hideo Saito, returned from his Puerto Rican excursion, turning on Nagata and joining Chaos. The following day Nagata received the shot at Triple Crown Heavyweight Championship he had earned by winning the Champion Carnival, but was defeated by the defending champion, Suwama. In August, Nagata took part in the 2011 G1 Climax and after picking up five victories, he went to the final day of the tournament with a chance of reaching the finals. However, a loss to former protégé, Hideo Saito, who had lost all eight of his previous matches in the G1 Climax, eliminated him from the running for a spot in the finals. On September 19, Nagata seemingly wrapped up his rivalry with Saito by defeating him in a singles match, but was then attacked by his CHAOS stablemate, Toru Yano. On October 10 at Destruction '11, Nagata defeated Yano by rolling him up for the three count. Following the main event, Nagata came out to challenge Hiroshi Tanahashi for the IWGP Heavyweight Championship. However, after Tanahashi had accepted the challenge, he was attacked by Yano, who proceeded to steal the championship belt. After Tanahashi had defeated Yano for the title, he successfully defended it against Nagata on December 4, tying his record of ten successful defenses in the process.