One System. Many Arts. The Warrior Path of Sensei Alex Aki-Ra Hernandez
There are martial artists who collect belts. And then there are warriors who collect wisdom. Sensei Alex Aki-Ra 明 Hernandez belongs firmly to the second category. Over more than fifteen years of relentless training, study, and teaching, Alex has walked one of the most diverse and disciplined paths in the modern martial arts world — absorbing the deepest lessons of samurai, shinobi, striker, and grappler alike — before forging them into something entirely his own. This is the story of a man who refused to be defined by a single art, and built a system worthy of them all.
Alex is the founder of Senji 戦時 — Combative War Arts — a modern martial arts system born from decades of cross-disciplinary training and an uncompromising commitment to practical, real-world effectiveness. Senji is not a collection of borrowed techniques thrown together for convenience. It is a carefully constructed framework that blends traditional martial philosophy with modern combative strategy, designed to take a student from white belt to Shodan — Black Belt level — across multiple disciplines within a single coherent system. As the owner and head instructor of Kai-den Jutsu Ryu Dojo 武術, based in South Florida, Miami, Alex has built a school that carries the full weight of traditional dojo culture into the digital age, offering structured online training programs to students around the world without sacrificing an ounce of discipline, respect, or rigor.
The credentials behind the system are serious and hard-earned. Alex holds Black Belts in Senji 戦時, Bujinkan Ninjutsu — Ninpo Taijutsu, and Taekwondo, along with a Second-Degree Brown Belt in Bushido SeiShin. He is a certified self-defense instructor and holds the distinguished title of Shidoshi-Ho Sensei within Bujinkan Ninpo Taijutsu — a title that carries deep significance within the Bujinkan tradition. His broader training has encompassed Wing Chun, Krav Maga, Small Circle Japanese Jujitsu, and Filipino Martial Arts including Arnis and Escrima. Each of these arts has left its fingerprints on the Senji system, contributing to a curriculum that is as technically rich as it is practically focused. His preferred weapons — the knife, the Bo staff, and Escrima sticks — are woven throughout the curriculum as integral components of a complete self-defense education.
Among all the arts Alex has studied, Wing Chun holds a special place. He is drawn to its close-range fighting concepts with a passion that goes beyond technical appreciation — he sees it as one of the most elegantly efficient combat systems ever developed. In his teaching, Alex consistently highlights Wing Chun's extraordinary effectiveness in confined environments: hallways, elevators, tight spaces where footwork is limited and structure becomes everything. He breaks down the combat ranges — kicking range, striking range, close-quarter trapping range, grappling range — with the precision of a man who has studied them deeply, and consistently returns to Wing Chun's mastery of the inside fighting distance as a cornerstone of real-world self-defense. His study of Wing Chun deepened significantly through the Global Kung Fu Alliance's Sifu certification program, an experience he describes as both eye-opening and transformative — one that revealed structural layers and conceptual depth that permanently expanded his understanding of the art.
The philosophy that drives Alex's teaching is as direct as a centerline strike: Keep It Simple and Straightforward. In a world full of flashy, overcomplicated martial arts content, Alex is a refreshing counterweight — a teacher who believes the greatest techniques are the ones that work when the adrenaline is pumping and the situation is real. He strips away the unnecessary, builds on fundamentals, and demands the kind of disciplined repetition that turns technique into instinct. His expertise in joint locking and control, shaped by years of Ninjutsu and Small Circle Jujitsu training, adds a sophisticated dimension to his teaching — but always in service of the same core principle: practical mastery under pressure.
What truly sets Sensei Alex apart is the depth of his character behind the technique. Despite dedicating his life to combat arts, he is a teacher who places awareness, de-escalation, and conflict avoidance at the very heart of his curriculum. He teaches his students to walk away whenever possible — and to be prepared for when they cannot. Humility, respect, and responsibility are not afterthoughts in his dojo. They are the foundation. Even in the online environment of Kai-den Jutsu Ryu Dojo, Alex maintains the full traditions of dojo culture: bowing, honoring the teacher-student relationship, and upholding the etiquette that transforms a training platform into a true martial arts school.
Today, Sensei Alex Aki-Ra 明 Hernandez continues to grow, teach, and inspire — carrying the warrior traditions of both the samurai and shinobi paths forward into a new era. Through the Senji system and Kai-den Jutsu Ryu Dojo, he is building something lasting: a community of disciplined, humble, and capable martial artists who understand that the way of the warrior is not just about fighting — it is a lifelong commitment to excellence, integrity, and the relentless pursuit of growth. For Sensei Alex, martial arts was never just a sport. It was always a calling. And he answers it every single day.