Kazuyuki Fujita
Unlike the New Japan Cup, the G1 Climax features the then-reigning IWGP Heavyweight Champion as one of the participants, except in 1992, 2001, 2004 and 2008, when then-champions Riki Choshu (in 1992), Kazuyuki Fujita (in 2001 and 2004), and Keiji Mutoh (in 2008), respectively, did not compete in the tournament. Often being labeled as a favorite to win the tournament, the IWGP Heavyweight Champion has reached the final five times, the first one being in 1995 when Keiji Mutoh won the tournament. Mutoh would repeat this feat again in 1999, but would lose the final to Manabu Nakanishi. Other then-reigning champions to reach the final include Kensuke Sasaki in 2000, Kazuyuki Fujita in 2005 and Yuji Nagata in 2007. Mutoh and Sasaki are the only two wrestlers to have won the G1 Climax while holding the IWGP Heavyweight Championship. Overall, Antonio Inoki holds the record for most tournament wins with ten, while Masahiro Chono with his five wins holds the record for most tournament wins under its G1 Climax name. Hiroyoshi Tenzan has taken part in the G1 Climax tournament a record 21 times.