Champion Carnival
From 1959 to 1972, the Japan Pro Wrestling Alliance (JWA), run by Rikidōzan, held a tournament called World League (also known as the "World Big League"), which featured both Japanese and foreign professional wrestlers. Rikidōzan himself dominated the annual tournament early on, however, after his death in 1963, the tournament was won six times by Giant Baba and once by Antonio Inoki. JWA folded shortly after both Baba and Inoki left the promotion to create All Japan Pro Wrestling (AJPW) and New Japan Pro-Wrestling (NJPW), respectively. Both men took the concept of World League with them to their new promotions, with Baba creating the "Champion Carnival" in 1973 and Inoki creating the World League in 1974, later renaming it G1 Climax.
Captain New Japan
Hirasawa originally debuted for New Japan Pro Wrestling (NJPW) on 28 January 2006, losing to Takashi Iizuka. Hirasawa would wrestle on the NJPW undercards, mostly losing which is custom for new wrestlers in NJPW. His first win would come on 26 April, defeating the two year pro Yujiro Takahashi. Hirasawa teamed up with Ryusuke Taguchi to participate in his first tournament, the National Area Tag League 2006 where they were placed in block C and lost both of their matches. Hirasawa would make several appearances for Pro Wrestling Zero1, the most notable of which was when he and Manabu Nakanishi participated in the Passion Cup Tag Tournament 2008. In late 2008, Hirasawa would form a tag team with Yuji Nagata, which would be a precursor to Seigigun ("Blue Justice Army"). The pair participated in the 2008 G1 Tag League block B, they would only gain a single point when they drew with Manabu Nakanishi and Yutaka Yoshie. In the fall of 2009, Hirasawa joined Yuji Nagata's new Seigigun stable, along with Wataru Inoue and Super Strong Machine. At Wrestle Kingdom IV in Tokyo Dome, Hirasawa, along with Inoue and Super Strong Machine defeated Jyushin Thunder Liger, Koji Kanemoto, and Kazuchika Okada in the opening match. Even with joining this stable, Hirasawa largely continued in the midcard largely serving as the fall guy in tag match. On 28 June, Seigigun entered a six-man tag tournament with Nagata, Inoue, and Hirasawa forming one team, while Machine teamed with Tonga Strong Machine and Pink Strong Machine (Yoshie). However, both teams lost. On 12 September, there was a special Mitsuhide Hirasawa farewell match, which he would lose.