The IWGP Heavyweight Championship, a top championship in New Japan Pro-Wrestling from 1987–2021 and 2026–present
IWGP Heavyweight Championship may also refer to: IWGP Heavyweight Championship (original version), New Japan Pro-Wrestling's top championship from 1983–1987 IWGP Heavyweight Championship (IGF), Inoki Genome Federation's top championship from 2007–2008 IWGP Tag Team Championship, also known as the IWGP Heavyweight Tag Team Championship, is a tag team championship sanctioned by New Japan Pro-Wrestling IWGP World Heavyweight Championship, New Japan Pro-Wrestling's top championship from 2021–2026