Naoya Inoue 井上 尚弥 – “The Monster”
Born: April 10, 1993, Zama, Kanagawa, Japan
Record: 33-0, 27 KOs as of May 2, 2026
Status: Undisputed super bantamweight champion. One of only 3 men to be undisputed in 2 weight classes in the four-belt era
His rise: Amateur → Pro “Monster”
- Started age 5 under his father Shingo, a former amateur boxer
- Amateur: 75-6 record. Represented Japan at 2011 World Championships
- Turned pro Oct 2, 2012 at 19
- Nickname: “Kaibutsu” 怪物 = “The Monster” – for power + speed at tiny weights
History across 4 weight divisions
Division Weight Titles Won Key Feats
1. Light Flyweight 108 lbs 2014 WBC Won world title in 6th pro fight – fastest for a Japanese boxer. Vacated to move up after 1 defense
2. Super Flyweight 115 lbs 2014-2018 WBO Beat 45-0 Omar Narvaez in 2 rounds to win title in 8th fight. Made 7 defenses. Jumped flyweight entirely
3. Bantamweight 118 lbs 2018-2023 WBA, WBC, IBF, WBO + Ring Undisputed champion Dec 2022. First undisputed bantamweight since 1972, first ever in 4-belt era. Beat Nonito Donaire x2, Paul Butler. Won WBSS tournament 2018-2019
4. Super Bantamweight 122 lbs 2023-present WBA, WBC, IBF, WBO + Ring Undisputed champion Dec 26, 2023 vs Marlon Tapales. First boxer to be undisputed at 122. 7 title defenses so far
Major achievements
1. Undisputed in 2 divisions
- Bantamweight: Unified all 4 belts Dec 13, 2022 vs Paul Butler
- Super Bantamweight: Unified all 4 belts Dec 26, 2023 vs Marlon Tapales
- Only Terence Crawford + Oleksandr Usyk have done this in 4-belt era
2. Pound-for-pound #1
Became first Japanese boxer ranked #1 P4P by The Ring in June 2022 after KO’ing Donaire
3. Fighter of the Year 2023
Swept awards: The Ring, BWAA, ESPN. First Japanese BWAA winner in 85 years. Won Japan’s Fighter of Year 7 straight times, 8 total
4. Knockout stats
- 84.375% KO ratio
- Only fighter to KO all 4 major sanctioning body champions in a single weight class
- 21 consecutive title bout wins = Japanese record
5. Signature wins
- Omar Narvaez 2014: 39-year-old champ, 45-0, dropped 4x in 2 rounds
- Nonito Donaire I 2019: FOTY contender. Broke Donaire’s orbital, won UD
- Nonito Donaire II 2022: KO2 to unify 3 belts, earn P4P #1
- Stephen Fulton 2023: Debut at 122, TKO8 to take WBC/WBO from unbeaten champ
- Marlon Tapales 2023: KO10 to become undisputed at super bantam
- Junto Nakatani May 2, 2026: UD12 at Tokyo Dome, 55,000 fans. Retained undisputed vs 32-0 three-division champ
Style – why “Monster”?
- Power: Carries KO power up through 4 divisions. Dropped everyone from 108 to 122
- Speed + timing: “Pinpoint accuracy and lightning reflexes”
- Body puncher: Breaks fighters with liver shots
- Adjustments: Been dropped by Donaire, Luis Nery, Ramon Cardenas – got up and finished all of them
What’s next?
Inoue said super bantamweight will likely be his final division. Plans to retire at 35. He’s asked Junto Nakatani to fight him next year at Tokyo Dome in “biggest fight in Japanese boxing history” – which he just won May 2, 2026.
Bottom line: Started at 108 lbs, now undisputed at 122 lbs. 4 divisions, 33-0, undisputed in 2, P4P #1, 27 KOs. Most dominant lower-weight fighter since Manny Pacquiao, and many argue his run is more legendary.
Want me to break down his amateur background or how his style compares to Crawford/Usyk?
