Kazuto Ioka
Division: juniorBantamweight
Nationality: Japan
Hometown: Tokyo, Japan
Birth Date: 1989-03-24
Height: 5.4 cm
Reach: 64.5 cm
Stance: orthodox
Professional Record
31
Wins
(16 by KO)4
Losses
(0 by KO)1
Draws
36
Total Fights
Biography
Kazuto Ioka (born March 24, 1989, in Sakai, Osaka) is one of Japan’s most accomplished boxers and the first Japanese fighter to win recognized world titles in four weight classes. A polished, economical technician with sharp counters and body work, Ioka has collected major belts at mini-flyweight, light-flyweight, flyweight, and super-flyweight, and unified at 105 lbs. His run at the lighter weights helped cement Japan’s modern dominance below bantamweight.
Turning pro in 2009 after a standout 95–10 amateur career, Ioka rose quickly. He captured the WBC mini-flyweight title in 2011, then unified by outpointing WBA champion Akira Yaegashi in 2012—an historic all-Japan unification. Moving up, he won the WBA (Regular) light-flyweight title in 2012 and defended it three times before climbing again to flyweight, where he claimed the WBA flyweight crown in 2015 and made five successful defenses.
After a brief retirement, Ioka returned at super flyweight and wrote history in 2019, stopping Aston Palicte to win the WBO super-flyweight title—his fourth division. He defended against unbeaten Jeyvier Cintrón and star Kosei Tanaka, then added wins over Francisco Rodríguez Jr., Ryoji Fukunaga, and avenged a split decision by outclassing Donnie Nietes in their rematch.
Ioka unified again on New Year’s Eve 2022 with a draw versus WBA champion Joshua Franco, then beat Franco in the rematch to lift the WBA super-flyweight title. He made one defense before dropping a unanimous decision to IBF champion Fernando Martínez in a July 7, 2024 unification in Tokyo.
Fight History
05/11/25 vs. Fernando Daniel Martinez, L-UD, 12/12
07/07/24 vs. Fernando Daniel Martinez, L-UD, 12/12
12/31/23 vs. Josber Perez, W-KO, 7/12
06/24/23 vs. Joshua Franco, W-UD, 12/12
12/31/22 vs. Joshua Franco, D-MD, 12/12
07/13/22 vs. Donnie Nietes, W-UD, 12/12
12/31/21 vs. Ryoji Fukunaga, W-UD, 12/12
09/01/21 vs. Francisco Rodriguez Jr., W-UD, 12/12
12/31/20 vs. Kosei Tanaka, W-TKO, 8/12
12/31/19 vs. Jeyvier Cintron, W-UD, 12/12
06/19/19 vs. Aston Palicte, W-TKO, 10/12
12/31/18 vs. Donnie Nietes, L-SD, 12/12
09/08/18 vs. McWilliams Arroyo, W-UD, 10/10
04/23/17 vs. Narast Aienleng, W-UD, 12/12
12/31/16 vs. Yutthana Kaensa, W-TKO, 7/12
07/20/16 vs. Keyvin Lara, W-KO, 11/12
12/31/15 vs. Juan Carlos Reveco, W-TKO, 11/12
09/27/15 vs. Roberto Domingo Sosa, W-UD, 12/12
04/22/15 vs. Juan Carlos Reveco, W-MD, 12/12
12/31/14 vs. Jean Piero Perez, W-KO, 5/10
09/16/14 vs. Pablo Carrillo, W-UD, 10/10
05/07/14 vs. Amnat Ruenroeng, L-SD, 12/12
12/31/13 vs. Felix Alvarado, W-UD, 12/12
09/11/13 vs. Ekkawit Songnui, W-KO, 7/12
05/08/13 vs. Phissanu Chimsunthom, W-KO, 9/12
12/31/12 vs. Jose Alfredo Rodriguez, W-TKO, 6/12
06/20/12 vs. Akira Yaegashi, W-UD, 12/12
12/31/11 vs. Veerawut Yuthimitr, W-TKO, 1/12
08/10/11 vs. Juan Hernandez Navarrete, W-UD, 12/12
02/11/11 vs. Kittipong Jaigrajang, W-TKO, 5/12
10/10/10 vs. Masayoshi Segawa, W-TKO, 10/10
07/25/10 vs. Albert Alcoy, W-TKO, 9/10
04/18/10 vs. Heri Amol, W-UD, 10/10
12/29/09 vs. Takashi Kunishige, W-UD, 10/10
07/26/09 vs. Hiroshi Matsumoto, W-TKO, 2/8
04/12/09 vs. Jadsada Polyiam, W-TKO, 3/6
Related News
WBO formally orders Kazuto Ioka and Junto Nakatani to compete for the title in their matchup
January 10, 2023
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