The IWA World Heavyweight Championship is the top singles title in the International Wrestling Association of Japan. The title has been in use since the IWA was founded in 1994.[1]
| Wrestler: | Times: | Date: | Location: | Notes: |
|---|---|---|---|---|
| Dick Slater | 1 | July 20, 1994 | Iwate | Defeated Nobutaka Araya.[1] |
| The title was vacated on August 15, 1995, when Slater left Japan to return to the United States due to his mother's illness. [1] | ||||
| Tarzan Goto | 1 | August 15, 1995 | Yokkaichi, Mie | Defeated Leatherface.[1] |
| The title was vacated on October 26, 1996, when Goto left the promotion. [1] | ||||
| Doug Gilbert | 1 | January 13, 1998 | Tokyo | Won a 15-man Battle Royal Death match, last eliminating Keisuke Yamada.[1] |
| Ghost Face / Tarzan Goto | 2 | April 13, 1998 | Tokyo | Goto wrestled as Ghost Face until June 27, 1999.[1] |
| The title was later vacated. [1] | ||||
| Jim Duggan | 1 | August 31, 2004 | Tokyo | Defeated The Big Boss Man in a six-man tournament final.[1] |
| Black Buffalo | 1 | July 2, 2009 | Tokyo | Defeated Keizo Matsuda to win the vacant championship |
| Keizo Matsuda | 1 | December 5, 2009 | Tokyo | Defeated Black Buffalo. |