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Kota Ibushi unified the IWGP Heavyweight and IWGP Intercontinental Championships in 2021. This was a significant accomplishment, as it made Ibushi the first wrestler to hold both titles simultaneously since Kazuchika Okada in 2016. Ibushi's victory was also notable because he defeated two of the most popular wrestlers in New Japan Pro-Wrestling: Hiroshi Tanahashi and Tetsuya Naito.