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New Japan Pro Wrestling
International Wrestling Grand Prix
World Heavyweight Championship
(March 1, 2021 — Present)
International Wrestling Grand Prix
World Heavyweight Championship
(March 1, 2021 — Present)
| Won By: | Date: | Event: | Location: | Reign: |
|---|---|---|---|---|
| Kota Ibushi | Mar 4, 2021 | Anniversary Show | Tokyo, Japan | 31 days |
|
After Ibushi, who was the reigning IWGP Heavyweight and IWGP Intercontinental Champion, successfully defended both titles against El Desperado at the event, they were unified into the IWGP World Heavyweight Championship, with Ibushi as the inaugural champion
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| Will Ospreay | Apr 4, 2021 | Sakura Genesis | Tokyo, Japan | 46 days |
| ** Vacated Due To Injury** | May 20, 2021 | -- | -- | 18 days |
|
Vacated due to injury.
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| Shingo Takagi | Jun 7, 2021 | Dominion | Osaka, Japan | 211 days |
| Kazuchika Okada | Jan 4, 2022 | Wrestle Kingdom | Tokyo, Japan | 159 days |
| Jay White | Jun 12, 2022 | Dominion | Osaka, Japan | 206 days |
| Kazuchika Okada [2] | Jan 4, 2023 | Wrestle Kingdom | Tokyo, Japan | 94 days |
| SANADA | Apr 8, 2023 | Sakura Genesis | Tokyo, Japan | 271 days |
| Tetsuya Naito | Jan 4, 2024 | Wrestle Kingdom | Tokyo, Japan | 99 days |
| Jon Moxley | Apr 12, 2024 | Windy City Riot | Chicago, USA | 79 days |
| Tetsuya Naito [2] | Jun 30, 2024 | Forbidden Door | Elmont, USA | 124 days |