returned to New Japan again a year later at Wrestle Kingdom 8 in Tokyo Dome, now working as The Great Muta in a tag team match, where he and Toru Yano defeated Suzuki-gun (Minoru Suzuki and Shelton X Benjamin). As the only face in the match, Muta turned on Yano towards the end of the match, but his green mist accidentally hit Suzuki instead, leading to Yano pinning him for the win. 2019–2023 Muto, in his Great Muta persona, was the last entrant in the Honor Rumble at the G1 Supercard Show on April 6, 2019. This marked his first appearance for the promotion in 5 years. On February 19, 2020 Muto made an appearance at the Tiger Hattori Retirement Show, appearing alongside fellow NJPW alumni Riki Choshu, The Great Kabuki, and Hiroshi Hase. On January 8, 2022, at Wrestle Kingdom 16, Muto teamed with Kaito Kiyomiya in a losing effort against Kazuchika Okada and Hiroshi Tanahashi during the event's main event match. On November 20, Muto, in his Great Muta persona, competed in his penultimate NJPW match at the Historic X-Over event. At the event, Muta teamed with Chaos (Kazuchika Okada and Toru Yano) to defeat United Empire (Great-O-Khan, Jeff Cobb, and Aaron Henare). On January 4, 2023, at Wrestle Kingdom 17 night 1, Muto competed in his final NJPW match, teaming with Hiroshi Tanahashi and Shota Umino to defeat Los Ingobernables de Japon (Tetsuya Naito, Sanada and Bushi). Muto appeared at night 2 of Wrestle Kingdom 17, challenging Natio to a retirement match as part of Noah's Keiji Muto Grand Final Pro-Wrestling "Last-Love" event. Wrestle-1 (2013–2020) On July 10, 2013, Muto announced the foundation of a promotion named Wrestle-1, bringing over many of the former wrestlers of All Japan Pro-Wrestling that left in June. At the promotion's inaugural event on September 8, Muto teamed with Bob Sapp in a main event tag team match, where they defeated René Duprée and Zodiac. During Wrestle-1's secondshow on September 15, Muto made his first Japanese appearance as The Great Muta in two years, when he and Tajiri defeated Duprée and Zodiac in a tag team match. On October 18, Muto announced his semi-retirement, saying that in the future he would only work Wrestle-1's larger events. On March 2, 2014, Muto put his career on the line at Kaisen: Outbreak, Wrestle-1's first event in Ryōgoku Kokugikan. Muto teamed with Rob Terry and