三冠ヘビー級王座
2001 proved to be Muto's year of renewal besides the formation of a new unit, as he challenged, and defeated Genichiro Tenryu for All Japan's coveted Triple Crown Heavyweight Championship on June 8. Muto successfully defended the title against Steve Williams in his first title defense on July 14. Muto would then enter the 2001 G1 Climax, where he won all matches in his block, with the exception of a loss to Satoshi Kojima, thus qualifying for the semi-final on August 11, in which he defeated Tadao Yasuda and then lost to Yuji Nagata in the final a day later. Muto would then defend the Triple Crown Heavyweight Championship for the first time in New Japan against Scott Hall on September 23, which Muto retained. Muto and Hase would then lose to Yuji Nagata and Jun Akiyama at Indicate of Next.