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. 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. After the failure of IWA Japan Victor Quiñones founded a homonymous federation in Puerto Rico in 1999, the International Wrestling Association.
- IWA Triple Crown Championship
- IWA World Heavyweight Championship
- IWA World Tag Team Championship
- IWA World Junior Heavyweight Championship
- AJPW/IWA Women's World Championship
- AWF World Women's Championship
- W*ING World Heavyweight Championship