日テレG+杯争奪ジュニアヘビー級タッグ・リーグ戦
From July 18 to August 5, Harada took part in the 2015 Global Junior Heavyweight League, where he won his block with a record of five wins and one loss, advancing to the finals, where he defeated Atsushi Kotoge to earn another shot at Taichi's title. On August 22, Harada and Kotoge announced they were reuniting for the 2015 NTV G+ Cup Junior Heavyweight Tag League, which would mark their first matches together as a tag team in four years. Harada received his shot at the GHC Junior Heavyweight Championship on September 19, but was defeated by Taichi. On September 22, Harada and Kotoge finished their round-robin block in the NTV G+ Cup Junior Heavyweight Tag League with a record of three wins and one loss, winning their block and advancing to the finals. Later that same day, they defeated the reigning GHC Junior Heavyweight Tag Team Champions El Desperado and Taka Michinoku in the finals to win the tournament. This led to a match on October 4, where Harada and Kotoge defeated El Desperado and Taka Michinoku to win the GHC Junior Heavyweight Tag Team Championship, becoming the first Noah wrestlers to reclaim one of the four GHC titles from the Suzuki-gun stable. Afterwards, Harada and Kotoge continued feuding with Suzuki-gun by successfully defending their title against members of the stable; first defeating El Desperado and Michinoku in a rematch on December 23, then defeating Taichi and Michinoku on January 31, 2016, and finally defeating Taichi and Yoshinobu Kanemaru on February 19. On March 19, Harada and Kotoge lost the title to Hajime Ohara and Kenoh. Harada and Kotoge regained the title in a rematch on April 5. They then went back to defending the title against Suzuki-gun, defeating El Desperado and Taka Michinoku for their first successful defense on April 30, before defeating Ohara and Kenoh in a title rematch on May 28. On June 12, Harada and Kotoge won a three-way match, defeating the Suzuki-gun team of Michinoku and Taichi as well as Gedo and Jado, to make their third successful title defense.