Toru Owashi
On September 19, Sasaki and Antonio Honda turned on their respective tag team partners Masa Takanashi and Yasu Urano and formed a new stable named "Los Calientes" with Hoshitango. Four days later, Sasaki returned to NJPW, losing to Low Ki at the Destruction pay-per-view. On September 30, Los Calientes faced off with Masa Takanashi's new stable, formed with Toru Owashi and Yuji Hino in a six-man tag team grudge match. During the match, Hino turned on Takanashi, handing Los Calientes the win and reforming the Monster Army with Sasaki, Honda and Hoshitango, with Honda claiming that Takanashi and Urano were the ones who ruined the original stable. On November 15, Sasaki returned to NJPW, entering the NEVER Openweight Championship tournament, from which he was eliminated after losing to Tomohiro Ishii in his first round match. DDT's 2012 ended with a storyline, where Sanshiro Takagi brought in the NJPW tag team of Hiroyoshi Tenzan and Satoshi Kojima to stop the Monster Army, in particular Antonio Honda, who had begun stealing other wrestlers' clothes. At the final event of the year on December 23, the entire Monster Army was defeated in a four-on-three handicap match by Takagi, Tenzan and Kojima, after which Sasaki, Honda, Hino and Hoshitango were all supposedly arrested by the NJPW duo. On January 27, 2013, Sasaki, Hino and Honda defeated Team Drift (Keisuke Ishii, Shigehiro Irie and Soma Takao) to win the KO-D 6-Man Tag Team Championship. They made their first successful title defense on March 20 against the team of Danshoku Dino, Gabai-Ji-chan and Makoto Oishi. On April 13, the Monster Army made another successful title defense against Dino, Oishi and Alpha Female. On April 21, Sasaki defeated Yasu Urano in a singles match and, as a result, took over his "Right to Challenge Anytime, Anywhere" contract, which gave him the right to challenge for the KO-D Openweight Championship anytime and anywhere he wanted to. As the contract was on the line in every match its holder took part in, Sasaki entered a storyline, where he began attacking referees whenever he was close to losing a match, causing a disqualification, which would cost him the match, but save the contract. On May 26, the Monster Army lost the KO-D 6-Man Tag Team Championship to Golden☆Rendezvous～ (Gota Ihashi, Kenny Omega and Kota Ibushi) in their third defense. Sasaki finally cashed in his "Right to Challenge Anytime, Anywhere" contract on June 23, but was defeated in the match for the KO-D Openweight Championship by the defending champion, Shigehiro Irie, after the interfering Monster Army was taken out of the equation by Irie's Team Drift stablemates Keisuke Ishii and Soma Takao. On June 28, Sasaki earned the final spot in the annual King of DDT tournament by winning an eight-man battle royal. He entered the tournament later that same event, defeating Soma Takao in his first round match. On July 6, Sasaki was eliminated from the tournament in the second round by Kenny Omega. In mid-2013, Sasaki and Honda once again began stealing clothes from other wrestlers, resuming the storyline from the previous year. This built to an eight-man tag team match on August 17, during the first day of DDT's 16th anniversary weekend in Ryōgoku Kokugikan, where Sasaki, Honda, Hino and Hoshitango were defeated by their victims Akito, Kazuki Hirata, Masa Takanashi and Yukio Sakaguchi. On January 13, 2014, Sasaki and Honda attempted to regain the KO-D 6-Man Tag Team Championship with new partner Shoichi Uchida, but were defeated by the defending champions, Team Homo Sapiens (Aja Kong, Danshoku Dino and Makoto Oishi). On January 17, DDT announced that Sasaki had signed a contract to officially make DDT his home promotion, ending his days as a freelancer. On February 23, after Sasaki, Antonio Honda and Hoshitango were defeated by Mikami, Sanshiro Takagi and Toru Owashi in a six-man tag team match, Honda announced that the Monster Army had decided to disband. On March 9, Sasaki won the Ironman Heavymetalweight Championship for the fourth time by attacking Kazuki Hirata before his title defense. He then went on to lose it to DJ Nira later that same event. On March 21, at Judgement 2014, Monster Army wrestled its final match together, where Sasaki, Honda, Hino and Hoshitango defeated Gorgeous Matsuno, Gota Ihashi, Sanshiro Takagi and Toru Owashi.