New Japan Pro-Wrestling
The promotion was founded by Antonio Inoki in 1972 after his departure from the Japan Pro Wrestling Alliance promotion. The first NJPW event took place on March 6, 1972, in Tokyo. Inoki would serve as the president of the promotion until 1989, when he stepped down to pursue a political career as a member of the Japanese House of Councillors. The promotion was a member of the National Wrestling Alliance (NWA) from 1975 to 1985 and once more from 1992 to 1993. NJPW was briefly reaffiliated with the NWA in the late 2000s to the early 2010s as well.
International Wrestling Association of Japan
The International Wrestling Association of Japan, more commonly known as IWA Japan, was a Japanese professional wrestling promotion operating from 1994 to 1996 and again from 2011 onwards. It was formed by Victor Quiñones as a successor to the W*ING promotion, which was folding at the time as a rival to Frontier Martial-Arts Wrestling (FMW), the pioneer of deathmatch wrestling in Japan and the only deathmatch promotion in Japan at the time. Most of the wrestlers jumped ship to Quiñones' new IWA Japan group. He found a sponsor in Tatsukuni "Kinroku" Asano, a business man who owned several restaurants in Tokyo and had bought and run several wrestling shows prior to IWA Japan.