Kazuto Ioka
Kazuto Ioka held 6 world titles across 4 weight classes, from minimumweight to super flyweight, between 2011 and 2024. Ioka first became a world champion aged 21 after winning the WBC minimumweight world title by beating Kittipong Jaigrajang.
- World title bouts
- 28
- Record in world title bouts (won–lost–drawn)
- 22–5–1
- World titles held
- 6
- Longest world title reign (WBO super flyweight, 2019–2023)
- 3 years, 7 months
WonLostDrawn or no contest
Timeline of world title events
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2026
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Takuma Inoue beats Kazuto Ioka via unanimous decision 12/12
Bantamweight · WBC
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2025
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The Ring magazine rates Kazuto Ioka No. 2 at super flyweight in its annual ratings
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Fernando Martinez beats Kazuto Ioka via unanimous decision 12/12
Super Flyweight · WBA Regular
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2024
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The Ring magazine rates Kazuto Ioka No. 3 at super flyweight in its annual ratings
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Fernando Martinez beats Kazuto Ioka via unanimous decision 12/12
Super Flyweight · WBA Regular and IBF
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2023
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Kazuto Ioka beats Josber Perez via knockout 7/12
Super Flyweight · WBA Regular
The Ring magazine rates Kazuto Ioka No. 1 at super flyweight in its annual ratings
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Kazuto Ioka beats Joshua Franco via unanimous decision 12/12
Super Flyweight · WBA Regular
-
Kazuto Ioka’s reign as the WBO super flyweight world champion ends
Super Flyweight · WBO
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2022
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Kazuto Ioka and Joshua Franco draw via majority decision 12/12
Super Flyweight · WBA Regular and WBO
The Ring magazine rates Kazuto Ioka No. 2 at super flyweight in its annual ratings
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Kazuto Ioka beats Donnie Nietes via unanimous decision 12/12
Super Flyweight · WBO
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2021
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Kazuto Ioka beats Ryoji Fukunaga via unanimous decision 12/12
Super Flyweight · WBO
The Ring magazine rates Kazuto Ioka No. 3 at super flyweight in its annual ratings
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Kazuto Ioka beats Francisco Rodriguez Jr via unanimous decision 12/12
Super Flyweight · WBO
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2020
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Kazuto Ioka beats Kosei Tanaka via knockout 8/12
Super Flyweight · WBO
The Ring magazine rates Kazuto Ioka No. 3 at super flyweight in its annual ratings
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2019
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Kazuto Ioka beats Jeyvier Cintron via unanimous decision 12/12
Super Flyweight · WBO
The Ring magazine rates Kazuto Ioka No. 3 at super flyweight in its annual ratings
-
Kazuto Ioka beats Aston Palicte via knockout 10/12
Super Flyweight · WBO
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2018
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Donnie Nietes beats Kazuto Ioka via split decision 12/12
Super Flyweight · WBO
The Ring magazine rates Kazuto Ioka No. 4 at super flyweight in its annual ratings
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2017
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Kazuto Ioka’s reign as the WBA Regular flyweight world champion ends
Flyweight · WBA Regular
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Kazuto Ioka beats Narast Aienleng via unanimous decision 12/12
Flyweight · WBA Regular
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2016
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Kazuto Ioka beats Yutthana Kaensa via knockout 7/12
Flyweight · WBA Regular
The Ring magazine rates Kazuto Ioka No. 1 at flyweight in its annual ratings
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Kazuto Ioka beats Keyvin Lara via knockout 11/12
Flyweight · WBA Regular
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2015
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Kazuto Ioka beats Juan Carlos Reveco via knockout 11/12
Flyweight · WBA Regular
The Ring magazine rates Kazuto Ioka No. 3 at flyweight in its annual ratings
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Kazuto Ioka beats Roberto Domingo Sosa via unanimous decision 12/12
Flyweight · WBA Regular
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Kazuto Ioka beats Juan Carlos Reveco via majority decision 12/12
Flyweight · WBA Regular
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2014
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The Ring magazine rates Kazuto Ioka No. 9 at flyweight in its annual ratings
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Amnat Ruenroeng beats Kazuto Ioka via split decision 12/12
Flyweight · IBF
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Kazuto Ioka’s reign as the WBA Regular light flyweight world champion ends
Light Flyweight · WBA Regular
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2013
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Kazuto Ioka beats Felix Alvarado via unanimous decision 12/12
Light Flyweight · WBA Regular
The Ring magazine rates Kazuto Ioka No. 2 at light flyweight in its annual ratings
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Kazuto Ioka beats Ekkawit Songnui via knockout 7/12
Light Flyweight · WBA Regular
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Kazuto Ioka beats Phissanu Chimsunthom via knockout 9/12
Light Flyweight · WBA Regular
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The Ring magazine rates Kazuto Ioka No. 5 at light flyweight in its annual ratings
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2012
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Kazuto Ioka beats Jose Alfredo Rodriguez via knockout 6/12
Light Flyweight · WBA Regular
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Kazuto Ioka’s reign as the WBA minimumweight world champion ends
Minimumweight · WBA
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Kazuto Ioka’s reign as the WBC minimumweight world champion ends
Minimumweight · WBC
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Kazuto Ioka beats Akira Yaegashi via unanimous decision 12/12
Minimumweight · WBA and WBC
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2011
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Kazuto Ioka beats Veerawut Yuthimitr via knockout 1/12
Minimumweight · WBC
The Ring magazine rates Kazuto Ioka No. 2 at minimumweight in its annual ratings
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Kazuto Ioka beats Juan Hernandez via unanimous decision 12/12
Minimumweight · WBC
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Kazuto Ioka beats Kittipong Jaigrajang via knockout 5/12
Minimumweight · WBC