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Some fighters are built in elite gyms surrounded by champions, pushed by coaches who specialize in creating competitors, training alongside teammates all chasing the same dream. Hyu Iwata, however, wasn't that fighter.
The 23-year-old Japanese phenom, who now carries an unblemished 13-0 kickboxing record and rides a four-knockout winning streak in ONE Championship, was built in a small dojo in Osaka where his teammates weren't particularly interested in competition.
What he became – Japan's full-contact karate champion, winner of the brutal JFKO Championship, and now an undefeated kickboxing sensation – he created largely on his own through sheer will and an understanding that results require pushing yourself when no one else is pushing you.
On April 29 at ONE SAMURAI 1 in Tokyo's Ariake Arena, Hyu faces compatriot Taiki Naito in a flyweight kickboxing clash that represents the latest chapter in a journey that began with a mother's fear of sliding tackles and evolved into mastery built from within.
"I was deciding between soccer and karate. I said I'd go with soccer, but my mom was scared of sliding tackles, so it ended up being karate," Hyu recalled with characteristic humor.
What if young Hyu had pursued soccer instead? But fate, filtered through a mother's protective instincts, pointed him toward the dojo, where he would discover not just a sport but the foundation for everything that followed.
The small dojo in Osaka where he trained wasn't designed to produce champions. It was a community space, a place where people came to learn basics, to get exercise, and to participate in a traditional martial art without necessarily dreaming of competitive glory.
"My gym was actually a really small dojo. It wasn't the kind of place heavily focused on competition. My teammates weren't really fight-focused either. But I just kind of broke through on my own from there," Hyu explained.
This detail matters because it speaks to something essential about Hyu's character. Many fighters credit world-class training environments, famous coaches, or competitive teammates for pushing them to greatness. Hyu had none of those advantages. What he had was internal drive: the ability to set his own standards and hold himself accountable when no one around him was doing the same.
The pinnacle of his karate career came with the JFKO Championship, considered by many to be the toughest karate tournament in the world. The format alone is brutal: a test not just of technique but of physical endurance and mental fortitude that few competitions can match.
"It's a two-day event. You fight about four bouts a day and win through a field of about 100 competitors to take the championship," Hyu described.
Winning the JFKO Championship didn't just prove Hyu's technical ability. It revealed his mental toughness, his capacity to recover between bouts, his ability to strategize against multiple opponents with different styles, and most importantly, his preparation throughout the year leading up to those two grueling days.
"I think what I learned was the importance of producing results. You have to push yourself every single day throughout the year for that one moment. You have to beat your own mind and get yourself prepared," Hyu reflected, articulating the lesson that would carry him from karate champion to undefeated kickboxing star.
The transition to kickboxing has been seamless. His 5-0 ONE Championship record includes four finishes. The Osaka native has proven that the foundation built in that small dojo, refined through full-contact karate competition, and hardened through the JFKO Championship translates perfectly to elite-level kickboxing, and he is living proof that great athletes can come from not-so-famous gyms.
