Kazuto Ioka was born on March 24, 1989, in Sakai, Osaka, Japan. Growing up in a family deeply connected to boxing, he was inspired by his uncle, Hiroki Ioka, a former flyweight world champion. Encouraged by his father, Kazunori Ioka, Kazuto began boxing in his teenage years, showing exceptional skill and discipline early on. As an amateur, he compiled an impressive record of 95 wins and 10 losses, winning multiple national high school championships and making it to the semifinals of the 2008 King’s Cup in Thailand.
Ioka briefly attended Tokyo Agricultural University with hopes of representing Japan in the 2008 Olympics, but he fell short in the qualifiers. Following this, he decided to pursue a professional boxing career in 2009.
Professional Career Highlights
Kazuto Ioka made his professional debut on April 12, 2009, defeating Thongthailek Sor Tanapinyo by a third-round technical knockout. Over the next few years, he built a strong record, eventually competing for the Japanese Light-Flyweight title, which he won by defeating Masayoshi Segawa.
He quickly rose through the ranks, capturing multiple world titles across four weight divisions:
Mini-Flyweight: Won the WBC mini-flyweight title in 2011 by defeating Oleydong Sithsamerchai. Successfully defended the title twice in the same year.
Unified Mini-Flyweight Champion: In June 2012, he defeated Akira Yaegashi to unify the WBA and WBC mini-flyweight titles.
Light-Flyweight: Captured the WBA (Regular) light-flyweight title in December 2012 and defended it multiple times.
Flyweight: Won the WBA flyweight title in 2015 and defended it successfully before moving to super-flyweight.
Super-Flyweight: Won the WBO super-flyweight title in 2019, becoming the first Japanese male boxer in history to win major world titles in four weight divisions. He later added the WBA super-flyweight title to his achievements.
Ioka’s style is known for its technical precision, speed, and excellent ring IQ, allowing him to outmaneuver opponents in multiple weight classes.
Kazuto Ioka Salary and Net Worth
Kazuto Ioka’s professional career has brought him both fame and financial success. As of 2025, his estimated net worth is around $4 million USD. This wealth comes from fight purses, sponsorships, and endorsements.
Major world title fights, especially defenses in Japan and international bouts, have contributed significantly to his earnings. Ioka also benefits from appearances and media engagements, reinforcing his status as one of Japan’s most successful boxing champions.
Kazuto Ioka Age and Height
Age: 36 years (as of 2025)
Height: 5 feet 4½ inches (164 cm)
Reach: 64½ inches (164 cm)
Despite his relatively modest stature, Ioka has excelled in lower weight divisions by combining speed, timing, and defensive skill to dominate opponents.
Kazuto Ioka’s Wife or Girlfriend
Kazuto Ioka is married to Nana Tanimura, a Japanese entertainer, since 2017. He generally keeps his personal life private, sharing few details publicly. Their marriage coincided with a brief hiatus from boxing in 2017, demonstrating Ioka’s dedication to balancing family life with a demanding professional career.
Kazuto Ioka Latest Career News
Kazuto Ioka remains active in professional boxing. His most recent bouts include:
May 2025: Fought Fernando Martínez in Tokyo for a super-flyweight title unification bout, losing by unanimous decision.
Post-fight Updates: Ioka confirmed he does not plan to retire, expressing his intention to continue competing at the highest level.
Upcoming Plans: He is expected to return to the ring later in 2025, continuing his pursuit of world titles and maintaining his position among the top contenders in the super-flyweight division.
These developments show that Ioka remains a key figure in the lighter weight classes and continues to challenge for championship honors.
His boxing Career, Net Worth, Age, Height, Wife, Family, and Biography via a Table
| Category | Details |
|---|---|
| Full Name | Kazuto Ioka |
| Nickname | “Baby-faced Assassin” |
| Date of Birth | March 24, 1989 |
| Age (as of 2025) | 36 years |
| Birthplace | Sakai, Osaka, Japan |
| Nationality | Japanese |
| Religion | Shinto / Buddhism (traditional Japanese upbringing) |
| Height | 5 ft 4½ in (164 cm) |
| Reach | 64½ in (164 cm) |
| Weight Class | Mini-Flyweight, Light-Flyweight, Flyweight, Super-Flyweight |
| Weight | Approx. 115–115 lbs (52–53 kg) for super-flyweight |
| Stance | Orthodox |
| Father’s Name | Kazunori Ioka (Trainer) |
| Mother’s Name | Not publicly disclosed |
| Marital Status | Married |
| Wife / Girlfriend | Nana Tanimura |
| College / Education | Tokyo Agricultural University (dropped out to turn professional) |
| Turned Professional | April 12, 2009 |
| Professional Debut Opponent | Thongthailek Sor Tanapinyo |
| Professional Wins | 31 Wins (16 by KO) |
| Professional Losses | 4 |
| Draws | 1 |
| Titles Held | WBC Mini-Flyweight, WBA (Regular) Light-Flyweight, WBA Flyweight, WBO Super-Flyweight, WBA Super-Flyweight |
| Highest World Ranking | Top 3 contender (Super-Flyweight, WBA/WBO, 2025) |
| Major Achievements | First Japanese male boxer to win world titles in four weight divisions |
| Current Residence | Osaka, Japan |
| Trainer / Coach | Kazunori Ioka (father) |
| Promoter / Management | Independent representation |
| Known For | Technical skill, speed, defensive precision, and longevity across four divisions |
| Language Spoken | Japanese, some English |
| Fan Base | Strong following in Japan and Asia |
| Last Major Fight | vs. Fernando Martínez – May 11, 2025 – Tokyo, Japan (lost by unanimous decision) |
| Next Fight (Expected) | Late 2025, Japan |
| Boxing Record (2025) | 31 Wins – 4 Losses – 1 Draw |
| KO Percentage | ~52% |
| Wiki Page | Kazuto Ioka – Wikipedia |
| Ethnicity | Japanese |
| Hobbies / Interests | Fitness, training, family time, mentoring younger boxers |
| Notable Quote | “I want to continue proving that I can fight at the top level even after years in boxing.” |
Kazuto Ioka Achievements
Kazuto Ioka’s career achievements are remarkable:
Four-Division World Champion: Won titles in mini-flyweight, light-flyweight, flyweight, and super-flyweight divisions.
Unified Titles: First Japanese male boxer to unify the WBA and WBC mini-flyweight titles.
WBO Super-Flyweight Champion (2019–2023): First Japanese male boxer to hold major titles in four divisions.
WBA Super-Flyweight Champion (2023–2024): Continued dominance in super-flyweight.
Professional Record (2025): Approximately 31 wins, 4 losses, 1 draw, with 16 wins by knockout.
Historic Firsts: Established himself as a trailblazer in Japanese boxing history with consistent success in multiple weight classes.
Read also more related boxers’ profiles: Sandor Martin
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Frequently Asked Questions (FAQs)
When did Kazuto Ioka turn professional?
He made his professional debut in April 2009.
How many world titles has Kazuto Ioka won?
Ioka has won world titles in four different weight divisions: mini-flyweight, light-flyweight, flyweight, and super-flyweight.
What is Kazuto Ioka’s height and reach?
He is 5′4½″ (164 cm) tall with a reach of 64½ inches (164 cm).
What is Kazuto Ioka’s estimated net worth?
His estimated net worth is $4 million USD as of 2025.
Who is Kazuto Ioka married to?
Kazuto Ioka has been married to Nana Tanimura, a Japanese entertainer, since 2017.
What is Kazuto Ioka’s latest fight?
His most recent fight was against Fernando Martínez in May 2025, which he lost by unanimous decision.
Is Kazuto Ioka planning to retire?
As of 2025, Ioka has stated that he has no plans to retire and intends to continue competing for world titles.
Conclusion
Kazuto Ioka is one of the most accomplished Japanese boxers of his generation. With world titles in four weight divisions, a technical and disciplined fighting style, and a career spanning more than a decade, Ioka has made an indelible mark on professional boxing.
At 36 years old, he continues to compete at the highest level, inspiring younger fighters and maintaining his legacy as a trailblazer in Japanese boxing history.
