For the purpose of this list, we will only take into account the three major wrestling countries: the USA, Japan and Mexico.
the US, every world title defended in a major federation's history will
be considered. These are WWE, NWA, WCW, ECW (the promotion, not the WWE brand), Impact Wrestling, AEW and AWA. Ring Of Honor and Pro Wrestling Guerrilla also make the cut as they're arguably the two most prestigious American indie promotions, and
because a large part of their champions went on to win world titles in
For Japan, we take into account world titles from the three biggest active federations (NJPW, AJPW and NOAH) as well as from the defunct IWA. We'll also consider two of the titles that make AJPW's Triple Crown as world titles, namely the PWF and NWA International championships, due to their status as world titles in the '70s and '80s.
In the case of Mexico, for the sake of coherence we'll only consider the heavyweight titles of the three major promotions - CMLL, AAA and UWA - even if the lower weight divisions are equally prestigious in Lucha Libre.