The upcoming U-Next Boxing 5 card, promoted by Teiken Promotions, is headlined by WBO flyweight world champion Anthony “Princesa” Olascuaga defending his title against OPBF flyweight champion Jukiya Iimura in the main event. This 12-round championship bout at flyweight (112 lbs / 50.8 kg) is scheduled for Sunday, March 15, 2026, at Yokohama Budokan (also referred to as Yokohama Buntai) in Yokohama, Kanagawa, Japan. The historic venue, a multi-purpose arena with a boxing setup capacity of around 5,000-10,000 depending on configuration, hosts frequent high-level Japanese boxing events with strong local support. The undercard is expected to start around 3:00 AM ET / 12:00 AM PT (early Sunday morning U.S. time, aligning with Japan Standard Time afternoon/evening), with the main broadcast (likely on U-Next streaming in Japan and potentially international platforms) featuring ringwalks for Olascuaga vs. Iimura around 4:00-5:00 AM ET / 1:00-2:00 AM PT (approximately 6:00-7:00 PM JST).
Injury Report
- Anthony Olascuaga: No reported injuries. Olascuaga has maintained a clean bill of health through his 2025 title defenses, including his most recent stoppage win in December 2025, with no setbacks or camp issues noted leading into this fifth defense.
- Jukiya Iimura: No current injuries. Iimura, who withdrew from a prior scheduled bout with Olascuaga (originally eyed for late 2025) due to timing/logistics rather than injury, has been healthy since his May 2025 win and appears fully prepared for this title challenge.
Fighter Matchups and Breakdown
This flyweight title defense features a hard-hitting American champion against a durable Japanese contender. Olascuaga (age ~26-27) brings explosive power (73% KO rate), aggressive orthodox pressure, body work, and finishing instinct, with advantages in power and experience against ranked/elite opposition. Iimura (age ~28) counters with solid fundamentals, a tough chin, and recent improvements in pro form (6-fight win streak), but lower power (22% KO rate) and limited elite exposure. Both stand around 5’4″-5’5″ with similar reaches, setting up a potential inside war where Olascuaga’s aggression clashes with Iimura’s volume and resilience in a 12-round test.
| Fighter | Age | Record | Height/Reach (approx.) | Stance | Fight Style Highlights |
| Anthony Olascuaga | ~26-27 | 11-1-0 (8 KOs) | 5’4″ / ~66″ | Orthodox | WBO flyweight champ; power puncher (73% KO rate); aggressive pressure and body shots; strong in defenses; durable despite lone loss. |
| Jukiya Iimura | ~28 | 9-1-0 (2 KOs) | 5’4.5″ / average | Orthodox | OPBF champ; technical and durable; improved volume; tough chin; low KO power but competitive in decisions. |
Recent Form
- Anthony Olascuaga: Olascuaga has dominated since capturing the WBO belt, going unbeaten with multiple defenses and finishes. He’s 5-0 in recent title bouts (all wins, 4 by stoppage).
Recent Fights:
- Dec 17, 2025: Win vs. Taku Kuwahara (TKO R4, WBO flyweight title defense, Ryogoku Kokugikan, Tokyo).
- Sep 11, 2025: Win vs. Juan Carlos Camacho Jr. (decision or stoppage, title defense).
- Earlier 2025: Multiple defenses solidifying reign with KOs and control.
- Jukiya Iimura: Iimura is on a 6-fight win streak, capturing the OPBF belt and showing growth against regional opposition. He’s 5-0 in his last five, mostly decisions.
Recent Fights:
- May 3, 2025: Win vs. Esneth Domingo (Unanimous Decision, 12 rounds, Korakuen Hall) – OPBF title win.
- Aug 16, 2024: Win vs. Tetsuya Mimura (UD 10).
- Prior: TKO win over Yuga Inoue (R9); consistent regional success.
Fight History
This is the first professional meeting between Olascuaga and Iimura—no prior head-to-head. A prior matchup was discussed for late 2025 but Iimura withdrew (timing-related), making this the realized title clash. Olascuaga’s career (debut ~2020) has been a rapid ascent to WBO champ with high finish rate. Iimura (pro since ~2020) has built regionally in Japan, earning OPBF gold but facing a massive step-up against a power-heavy world champ.
FIGHT ODDS
Anthony Olascuaga – 1600
Jukiya Iimura
+ 900
Odds Courtesy of Sports Odds Direct as of Friday, March 13, 2026
