NWA/UPW/ZERO-ONE	(	2002/06/29	-	2004/10/31	)
ZERO-ONE/UPW/World-1	(	2004/10/31	-	2005/02/28	)
AWA/ZERO1-Max/UPW/World-1	(	2005/02/28	-	2006/07/27	)
ZERO1-Max	(	2007/12/15	-	2009/01/01	)
ZERO1	(	2009/01/01	-		)

International Junior Heavyweight Title
(as of 2013/05/04)

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Leonard Spanky	02/06/29	Sapporo
Defeats Smelly to become the first champion.
Low Ki	02/09/16	Tokyo
Wataru Sakata	03/08/31	Gifu
Vacates on 04/04/12 to enter the Tenka-ichi Junior Heavyweight League.
Tatsuhito Takaiwa	04/05/16	Tokyo
Defeats Tony Stradlin; ZERO-ONE leaves NWA on 04/10/31.
Super Crazy	04/12/18	Chiba
Recognized also by AWA after 05/02/28.
Ikuto Hidaka	05/04/14	Tokyo
Takuya Sugawara	06/02/26	Tokyo
Tatsuhito Takaiwa [2]	06/07/27	Osaka
Vacates on the same day.
Ikuto Hidaka [2]	07/12/15
Defeats Dick Togo for AWA World Title on 07/10/26 in Tokyo; renamed International Title on 07/12/15 after ZERO1-Max leaves AWA.
Masaaki Mochizuki	08/01/23	Tokyo
Ikuto Hidaka [3]	08/06/26	Tokyo
Sonjay Dutt	09/03/15	Tokyo
Ikuto Hidaka [3]	09/11/29	Tokyo
Defeats Prince Devitt in the Tenka-ichi Junior Heavyweight final; Devitt has defeated Dutt in the semi-final.
Takuya Sugawara [2]	11/05/23	Tokyo
Also wins NWA World Title, defeating Tsuyoshi Kikuchi on 12/03/02 in Tokyo.
Jonathan Gresham	13/05/04	Tokyo
Wins both titles.