Yuji Nagata is a Japanese professional wrestler, and former mixed martial artist and amateur wrestler currently signed to New Japan Pro-Wrestling (NJPW). Considered one of the greatest Japanese wrestlers of all time, he is the fifth longest-reigning IWGP Heavyweight Champion with a reign of 392 days, and formerly held the record for most successful title defenses with 10, until Hiroshi Tanahashi broke the record at Wrestle Kingdom VI. He is the only wrestler to have won Japanese professional wrestling's three biggest singles tournaments; New Japan Pro-Wrestling's G1 Climax (in 2001), All Japan Pro Wrestling's Champion Carnival (in 2011) and Pro Wrestling Noah's Global League (in 2013). In addition, he is the only man to have held all four major heavyweight championships in Japanese professional wrestling, the IWGP, World, GHC and Triple Crown heavyweight championships, making him the only "Grand Slam" champion.