| IWA World Heavyweight Championship | |
| Created: | 1968 |
| Titleretired: | September 30, 1981 |
| Promotion: | International Wrestling Enterprise |
| Firstchamp: | Bill Robinson |
| Finalchamp: | Rusher Kimura |
| Mostreigns: | Rusher Kimura (5 reigns) |
| Longestreign: | Rusher Kimura (1,085 days) |
| Shortestreign: | Verne Gagne (3 days) |
| Oldest: | Verne Gagne |
| Youngest: | Mighty Inoue |
| Heaviest: | Bill Miller (290lb) |
| Lightest: | Verne Gagne (215lb) |
The was a professional wrestling world heavyweight championship of the Japanese professional wrestling promotion known as . It was the first Japanese heavyweight title to be billed as a World title, and in the 1970s and early 1980s it was one of the most important titles in Japan. The title died with the promotion in 1981 but was later revived by Goro Tsurumi for his independent Kokusai Promotion.
There have been eighteen reigns between twelve wrestlers, and three vacancies.
| Rank | Wrestler | data-sort-type="number" | No. of reigns | data-sort-type="number" | Combined defenses | data-sort-type="number" | Combined days |
|---|---|---|---|---|---|---|---|
| 1 | 5 | 57 | 2,290 | ||||
| 2 | 2 | 27 | 949 | ||||
| 3 | 1 | 9 | 654 | ||||
| 4 | 2 | 28 | 225 | ||||
| 5 | 1 | 3 | 185 | ||||
| 6 | 1 | 0 | 107 | ||||
| 7 | 1 | 2 | 52 | ||||
| 8 | 1 | 0 | 47 | ||||
| 9 | 1 | 1 | 21 | ||||
| 10 | 1 | 0 | 9 | ||||
| 11 | 1 | 0 | 4 | ||||
| 12 | 1 | 0 | 3 |