IWGP Heavyweight Championship

The IWGP Heavyweight Championship (IWGPヘビー級王座, IWGP hebī-kyū ōza) is a men's professional wrestlingworld heavyweight championship owned by New Japan Pro-Wrestling (NJPW). The current champion is Yota Tsuji in his second reign. He won the title by defeating Callum Newman at Dominion 6.14 in Osaka-jo Hall in Osaka, Japan, on June 14, 2026.

The title was first introduced on June 12, 1987 as the prize of that year's IWGP League tournament, with Antonio Inoki crowned as the inaugural champion. Although bearing the same name, it was established as the successor to the original IWGP Heavyweight Championship that existed from 1983 to 1987. The title was later unified with the IWGP Intercontinental Championship on March 4, 2021 to form the IWGP World Heavyweight Championship, which was originally recognized as a new separate title, with both the Heavyweight and Intercontinental championships retired. However, on January 6, 2026, Tsuji declared, two days after winning the title, that the Heavyweight Championship was reactivated, replacing the World Heavyweight Championship and retroactively unifying the lineages of both titles.

The championship has been primarily represented by five different belt designs from 1987 to 2026, including the IWGP World Heavyweight Championship. The fourth design, or the V4, was introduced in March 2008, previously retired in 2021, and reintroduced in 2026. The IWGP Heavyweight Championship is regularly defended as the primary heavyweight championship in NJPW.