Minimumweight title history

WBO

Ryusei Matsumoto

2 November 2026Reigning for 1 month

Was elevated from interim to full WBO champion after Oscar Collazo relinquished the title.

Details & 1 source

Promoted to the WBO minimumweight title.

Was elevated from interim to full WBO champion after Oscar Collazo relinquished the title

WBO source

Event date recorded in the source.

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Division

All recorded title changes120

Exact dates are shown where recorded. Month-only dates mark the first appearance in our ranking archive, not necessarily the date the title was won.

Minimumweight champions and recorded title changes
Date	Organisation	Champion	Title	Evidence
2 November 2026	WBO	Ryusei Matsumoto	Champion	Was elevated from interim to full WBO champion after Oscar Collazo relinquished the title WBO source
27 September 2026	WBO	Ryusei Matsumoto	Interim Champion	Won the vacant WBO interim title by unanimous decision against Russell Acosta in Tokyo WBO source
2 September 2026	WBA	Takeshi Ishii	World Champion	Won the vacant title by knocking out Wilfredo Mendez in the first round in Yokohama WBA source
16 May 2026	WBC	Siyakholwa Kuse	Champion	Won the title by defeating Melvin Jerusalem in their rematch at Emperors Palace in South Africa WBC source
14 September 2025	WBA	Ryusei Matsumoto	World Champion	Won the title by defeating Yuni Takada WBA source
16 November 2024	WBARING	Oscar Collazo	Super Champion, Champion	Won the title by stopping Thammanoon Niyomtrong in the seventh round in Riyadh. Became The Ring's first minimumweight champion by stopping Thammanoon Niyomtrong in the seventh round in Riyadh. WBA source RING source
28 July 2024	IBF	Pedro Taduran	Champion	Regained the IBF title by stopping Ginjiro Shigeoka in the ninth round in Japan IBF source
31 March 2024	WBC	Melvin Jerusalem	Champion	Won the title by defeating Yudai Shigeoka WBC source
7 October 2023	IBF	Ginjiro Shigeoka	Champion	Won the title by defeating Daniel Valladares IBF source
7 October 2023	WBC	Yudai Shigeoka	Champion	Won the title by defeating Panya Pradabsri WBC source
27 May 2023	WBO	Oscar Collazo	Champion	Won the title by stopping Melvin Jerusalem after seven rounds WBO source
16 April 2023	IBF	Ginjiro Shigeoka	Interim Champion	Won the interim IBF title by knocking out Rene Mark Cuarto in the ninth round in Tokyo IBF source
16 April 2023	WBC	Yudai Shigeoka	Interim Champion	Won the interim WBC title by knocking out Wilfredo Mendez in the seventh round in Tokyo WBC source
6 January 2023	WBO	Melvin Jerusalem	Champion	Won the title by defeating Masataka Taniguchi WBO source
1 July 2022	IBF	Daniel Valladares	Champion	Won the title by defeating Rene Mark Cuarto IBF source
21 December 2021	WBA	Erick Rosa	World Champion	Won the title by defeating Vic Saludar WBA source
14 December 2021	WBO	Masataka Taniguchi	Champion	Won the title by defeating Wilfredo Méndez WBO source
27 February 2021	IBF	Rene Mark Cuarto	Champion	Won the title by defeating Pedro Taduran IBF source
20 February 2021	WBA	Vic Saludar	World Champion	Won the title by defeating Robert Paradero WBA source
27 November 2020	WBC	Panya Pradabsri	Champion	Won the title by defeating Wanheng Menayothin WBC source
February 2020	WBA	Thammanoon Niyomtrong	Super Champion	Was elevated to WBA Super Champion before the March 2020 Tanaka defense. The WBA calls the promotion recent but does not date the decision; neither the defense day nor the rankings publication day is substituted. WBA source
7 September 2019	IBF	Pedro Taduran	Champion	Won the title by defeating Samuel Salva IBF source
24 August 2019	WBO	Wilfredo Mendez	Champion	Won the title by defeating Vic Saludar WBO source
16 February 2019	IBF	DeeJay Kriel	Champion	Won the title by defeating Carlos Licona IBF source
1 December 2018	IBF	Carlos Licona	Champion	Won the title by defeating Mark Anthony Barriga IBF source
13 July 2018	WBO	Vic Saludar	Champion	Won the title by defeating Ryuya Yamanaka WBO source
27 August 2017	WBO	Ryuya Yamanaka	Champion	Won the title by defeating Tatsuya Fukuhara WBO source
23 July 2017	IBF	Hiroto Kyoguchi	Champion	Won the title by defeating José Argumedo IBF source
11 April 2017	WBO	Tatsuya Fukuhara	Champion	Was recognized as full WBO champion on 11 April 2017, the date explicitly recorded by the Japanese Professional Boxing Association WBO source
20 August 2016	WBO	Katsunari Takayama	Champion	Won the title by defeating Riku Kano WBO source
29 June 2016	WBA	Thammanoon Niyomtrong	World Champion	Won the full WBA title by defeating Byron Rojas by unanimous decision after previously holding the interim title WBA source
19 March 2016	WBA	Byron Rojas	World Champion	Won the title by defeating Hekkie Budler WBA source
20 January 2016	WBA	Hekkie Budler	Super Champion	Was designated WBA Super Champion by Championships Committee resolution 201601200112 WBA source
31 December 2015	IBF	Jose Argumedo	Champion	Won the title by defeating Katsunari Takayama IBF source
30 May 2015	WBO	Kosei Tanaka	Champion	Won the title by defeating Julian Yedras WBO source
31 December 2014	IBFWBO	Katsunari Takayama	Champion	Won the vacant title by defeating Go Odaira. Won the title by defeating Go Odaira. IBF source WBO source
6 November 2014	WBC	Wanheng Menayothin	Champion	Won the title by defeating Oswaldo Novoa WBC source
9 August 2014	IBF	Francisco Rodriguez Jr	Champion	Won the title by defeating Katsunari Takayama IBF source
22 March 2014	WBO	Francisco Rodriguez Jr	Champion	Won the title by defeating Merlito Sabillo WBO source
27 February 2014	WBA	Hekkie Budler	World Champion	Was elevated from interim to WBA world champion after Ryo Miyazaki relinquished the title WBA source
5 February 2014	WBC	Oswaldo Novoa	Champion	Won the title by defeating Xiong Chaozhong WBC source
April 2013	WBO	Merlito Sabillo	Champion	Was elevated from interim to full champion in the April 2013 WBO rankings. The 22 April press conference presented him as champion; it does not establish when the elevation took effect. WBO source
30 March 2013	IBF	Katsunari Takayama	Champion	Won the title by defeating Mario Rodríguez IBF source
9 March 2013	WBO	Merlito Sabillo	Interim Champion	Won the vacant interim title by stopping Luis de la Rosa in the eighth round WBO source
31 December 2012	WBA	Ryo Miyazaki	World Champion	Won the title by defeating Pornsawan Porpramook WBA source
24 November 2012	WBC	Chaozhong Xiong	Champion	Won the vacant title by defeating Javier Martínez Resendiz WBC source
1 September 2012	IBF	Mario Rodriguez	Champion	Won the title by defeating Nkosinathi Joyi IBF source
24 June 2012	WBA	Kazuto Ioka	World Champion	Won the title by defeating Akira Yaegashi WBA source
24 October 2011	WBA	Akira Yaegashi	World Champion	Won the title by defeating Pornsawan Porpramook WBA source
27 August 2011	WBO	Moises Fuentes	Champion	Won the title by defeating Raúl García WBO source
30 July 2011	WBA	Pornsawan Porpramook	World Champion	Won the title by defeating Muhammad Rochim WBA source
21 May 2011	WBA	Juan Palacios	Interim Champion	Won the interim title by defeating Sammy Gutierrez by unanimous decision WBA source
19 April 2011	WBA	Muhammad Rochim	World Champion	Won the title as Muhammad Rachman by knocking out Kwanthai Sithmorseng in the ninth round WBA source
24 February 2011	WBO	Raul Garcia	Champion	Promoted after Donnie Nietes vacated to move up in weight WBO source
11 February 2011	WBC	Kazuto Ioka	Champion	Won the title by defeating Oleydong Sithsamerchai WBC source
5 November 2010	WBA	Ekkawit Songnui	World Champion	Won the vacant title as Kwanthai Sithmorseng by defeating Pigmy Muangchaiyaphum by split decision WBA source
30 October 2010	WBO	Raul Garcia	Interim Champion	Won the interim title by split decision against Luis De La Rosa WBO source
23 October 2010	WBA	Sammy Guti	Interim Champion	Won the interim title by stopping Luis Carrillo in the third round WBA source
26 March 2010	IBF	Nkosinathi Joyi	Champion	Won the title by defeating Raúl García IBF source
6 December 2008	WBO	Manuel Vargas	Interim Champion	Won the interim title by knocking out Daniel Reyes in round four WBO source
26 September 2008	WBO	Daniel Reyes	Interim Champion	Won the interim title by majority decision against Luis Alberto Lazarte WBO source
15 September 2008	WBA	Roman Gonzalez	World Champion	Won the title by defeating Yutaka Niida WBA source
2 August 2008	WBC	Juan Palacios	Interim Champion	Won the interim WBC title by stopping Omar Soto in the tenth round in Ponce, Puerto Rico. WBC source
14 June 2008	IBF	Raul Garcia	Champion	Won the title by defeating Florante Condes IBF source
29 November 2007	WBC	Oleydong Sithsamerchai	Champion	Won the title by defeating Eagle Den Junlaphan WBC source
30 September 2007	WBO	Donnie Nietes	Champion	Won the title by defeating Pornsawan Porpramook WBO source
7 July 2007	IBF	Florante Condes	Champion	Won the title by defeating Muhammad Rachman IBF source
7 November 2006	WBA	Katsunari Takayama	Interim Champion	Won the interim title by technical decision against Carlos Melo after nine rounds WBA source
12 September 2006	WBO	Ivan Calderon	Super Champion	Was designated WBO Super Champion while already holding its minimumweight title WBO source
6 August 2005	WBC	Eagle Den Junlaphan	Champion	Won the title by defeating Katsunari Takayama WBC source
4 April 2005	WBC	Katsunari Takayama	Champion	Won the title by defeating Isaac Bustos WBC source
18 December 2004	WBC	Isaac Bustos	Champion	Won the title by defeating Eagle Den Junlaphan WBC source
14 September 2004	IBF	Muhammad Rachman	Champion	Won the title by defeating Daniel Reyes IBF source
3 July 2004	WBA	Yutaka Niida	World Champion	Won the title by defeating Noel Arambulet WBA source
31 January 2004	WBA	Juan Landaeta	Interim Champion	Won the interim title by defeating Chana Porpaoin by unanimous decision WBA source
10 January 2004	WBC	Eagle Den Junlaphan	Champion	Won the title by defeating José Antonio Aguirre WBC source
4 October 2003	IBF	Daniel Reyes	Champion	Won the title by defeating Edgar Cárdenas IBF source
31 May 2003	IBF	Edgar Cardenas	Champion	Won the title by defeating Miguel Barrera IBF source
3 May 2003	WBO	Ivan Calderon	Champion	Won the title by defeating Eduardo Marquez WBO source
28 March 2003	WBO	Eduardo Marquez	Champion	Won the title by defeating Jorge Mata Ferradal WBO source
December 2002	WBO	Jorge Mata Ferradal	Champion	Was elevated from interim to full champion after the WBO declined Kermin Guardia’s extension request. A contemporary 19 December 2002 report identifies the November Arango bout as an interim-title defense and confirms the later full-title listing, but does not date the promotion decision. WBO source
9 August 2002	IBF	Miguel Barrera	Champion	Won the title by defeating Roberto Carlos Leyva IBF source
29 July 2002	WBA	Noel Alfonso Arambulet	World Champion	Won the title by defeating Keitaro Hoshino. WBA source WBA source
29 July 2002	WBA	Noel Arambulet	Champion	Won the title by defeating Keitaro Hoshino WBA source
29 January 2002	WBA	Keitaro Hoshino	World Champion	Won the title by defeating Joma Gamboa WBA source
25 August 2001	WBA	Yutaka Niida	World Champion	Won the title by defeating Chana Porpaoin WBA source
29 April 2001	IBF	Roberto Carlos Leyva	Champion	Won the vacant title by defeating Daniel Reyes IBF source
16 April 2001	WBA	Chana Porpaoin	World Champion	Won the title by defeating Keitaro Hoshino WBA source
6 December 2000	WBA	Keitaro Hoshino	World Champion	Won the title by defeating Joma Gamboa WBA source
20 August 2000	WBA	Joma Gamboa	World Champion	Won the title by defeating Noel Arambulet WBA source
11 February 2000	WBC	Jose Antonio Aguirre	Champion	Won the title by defeating Wandee Singwangcha WBC source
9 October 1999	WBA	Noel Alfonso Arambulet	World Champion	Won the title by defeating Joma Gamboa. WBA source WBA source
9 October 1999	WBA	Noel Arambulet	Champion	Won the vacant title by defeating Joma Gamboa WBA source
28 September 1999	WBC	Wandee Singwangcha	Champion	Promoted from Interim Champion to WBC Champion WBC source
13 November 1998	WBA	Ricardo Lopez	Champion	Won the vacant title by defeating Rosendo Álvarez WBA source
30 May 1998	WBO	Kermin Guardia	Champion	Won the title by stopping Eric Jamili in the fifth round WBO source
27 December 1997	IBF	Zolani Petelo	Champion	Won the title by defeating Ratanapol Sor Vorapin IBF source
19 December 1997	WBO	Eric Jamili	Champion	Won the vacant title by defeating Mickey Cantwell WBO source
23 August 1997	WBO	Ricardo Lopez	Champion	Won the title by defeating Alex Sánchez WBO source
18 May 1996	IBF	Ratanapol Sor Vorapin	Champion	Won the vacant title by defeating Jun Arlos IBF source
2 December 1995	WBA	Rosendo Alvarez	Champion	Won the title by defeating Chana Porpaoin WBA source
22 December 1993	WBO	Alex Sanchez	Champion	Won the vacant title by defeating Orlando Malone WBO source
15 May 1993	WBO	Paul Weir	Champion	Won the vacant title by defeating Fernando Martínez WBO source
10 February 1993	WBA	Chana Porpaoin	Champion	Won the title by defeating Hideyuki Ohashi WBA source
10 December 1992	IBF	Ratanapol Sor Vorapin	Champion	Won the title by defeating Manny Melchor IBF source
14 October 1992	WBA	Hideyuki Ohashi	Champion	Won the title by defeating Choi Hi-yong WBA source
6 September 1992	IBF	Manny Melchor	Champion	Won the title by defeating Fahlan Sakkreerin IBF source
2 February 1991	WBA	Choi Hi Yong	Champion	Won the title by defeating Kim Bong-jun WBA source
25 October 1990	WBC	Ricardo Lopez	Champion	Won the title by defeating Hideyuki Ohashi WBC source
22 February 1990	IBF	Fahlan Sakkreerin	Champion	Won the title by defeating Eric Chavez IBF source
7 February 1990	WBC	Hideyuki Ohashi	Champion	Won the title by defeating Choi Jum-Hwan WBC source
12 November 1989	WBC	Choi Jum Hwan	Champion	Won the title by defeating Napa Kiatwanchai WBC source
21 September 1989	IBF	Eric Chavez	Champion	Won the title by defeating Nico Thomas IBF source
17 June 1989	IBF	Nico Thomas	Champion	Won the title by defeating Samuth Sithnaruepol IBF source
16 April 1989	WBA	Kim Bong Jun	Champion	Won the vacant title by defeating Agustín García WBA source
13 November 1988	WBC	Napa Kiatwanchai	Champion	Won the title by defeating Hiroki Ioka WBC source
24 March 1988	IBF	Samuth Sithnaruepol	Champion	Won the vacant title by defeating Domingo Lucas IBF source
10 January 1988	WBA	Leo Gamez	Champion	Won the title by defeating Kim Bong-Jun WBA source
18 October 1987	WBC	Hiroki Ioka	Champion	Won the title by defeating Mai Thomburifarm WBC source
14 June 1987	IBF	Kyung Yung Lee	Champion	Won the title by defeating Masaharu Kawakami IBF source