The upcoming U-Next Boxing 5 card, promoted by Teiken Promotions, features a high-profile WBA Bantamweight (118 lbs) Final Eliminator in the co-feature or main card slot: veteran legend Nonito “The Filipino Flash” Donaire faces rising Japanese contender Riku Masuda. This scheduled 10-round bout (some sources list as 12, but confirmed eliminator format leans 10) is set at Yokohama Buntai (Yokohama Budokan) in Yokohama, Kanagawa, Japan.
The venue is a multi-purpose arena with a boxing setup capacity of around 5,000-10,000, delivering an intense, packed-house atmosphere favoring the local fighter. The undercard starts around 3:00 AM ET / 12:00 AM PT (early Sunday U.S. time, aligning with afternoon/evening JST), with the main broadcast (U-Next in Japan, potential international streams) featuring ringwalks for Donaire vs. Masuda around 4:00-5:00 AM ET / 1:00-2:00 AM PT (6:00-7:00 PM JST, subject to card flow).
Injury Report
- Nonito Donaire: No reported injuries. Donaire, at 43, has arrived in Japan healthy after his December 2025 split decision loss to Seiya Tsutsumi, with no setbacks in camp or media reports.
- Riku Masuda: No current injuries noted. Masuda has maintained activity and health post his November 2025 win, appearing fully cleared for this career-high eliminator.
Fighter Matchups and Breakdown
This bantamweight eliminator contrasts Donaire’s legendary experience, power, and counterpunching against Masuda’s youth, finishing rate, and home-crowd energy. Donaire (43) brings southpaw mastery (65% KO rate), elite timing, and durability despite age, with advantages in big-fight savvy. Masuda (28), southpaw, offers explosive power (89% KO rate), length (5’6.5″ / 169 cm height, 69″ reach vs. Donaire’s 5’5″ / 166 cm, ~68″ reach), and aggression. The matchup tests Donaire’s chin and legs against Masuda’s pressure in a potential early fireworks or veteran grind.
| Fighter | Age | Record | Height/Reach (approx.) | Stance | Fight Style Highlights |
| Nonito Donaire | 43 | 43-9-0 (28 KOs) | 5’5″ / ~68″ | Southpaw | Hall-of-Fame level; lethal left hook/counterpuncher (65% KO rate); durable chin; elite experience (multiple divisions/titles); age-related questions on speed/recovery. |
| Riku Masuda | 28 | 9-1-0 (8 KOs) | 5’6.5″ / 69″ | Southpaw | Rising power puncher (89% KO rate); aggressive pressure; strong chin; limited elite exposure but high finish % in regional bouts. |
Recent Form
- Nonito Donaire: Donaire remains competitive at elite level despite age, with mixed results in recent years but strong showings. He’s 2-2 in his last four (including a competitive loss to Tsutsumi).
Recent Fights:
- Dec 17, 2025: Loss vs. Seiya Tsutsumi (Split Decision, 12 rounds, WBA bantamweight unification, Tokyo).
- Prior 2025/2024: Competitive bouts with wins/losses; notable resilience in losses.
- Riku Masuda: Masuda is on a tear, unbeaten in recent activity with high KO finishes. He’s 6+ wins in streak, showcasing power.
Recent Fights:
- Nov 24, 2025: Win vs. Jose Miguel Calderon Cervantes (Technical Decision R5).
- Earlier 2025/2024: Multiple KO wins building record (e.g., 8 KOs in 9 wins).
Fight History
This is the first professional encounter between Donaire and Masuda—no prior head-to-head or shared opponents of note. Donaire’s storied career (debut 2001) includes world titles across four divisions and Hall-of-Fame credentials. Masuda (debut 2022) has a short but explosive resume, positioning this as his breakout international test against a legend.
FIGHT ODDS
Nonito Donaire + 150
Riku Masuda – 210
Odds Courtesy of Sports Odds Direct as of Friday, March 13, 2026
