Tributes paid to a true master

The world of traditional Japanese martial arts has lost a true master. Ishizuka Tetsuji, head of the Gyokko Ryu tradition, passed away on March 15, 2025, at the age of 77, after a long battle with lung cancer. His passing marks the end of an era for the Bujinkan community and for all those who had the honour of learning from his vast knowledge and experience.

A Lifetime of Dedication to Martial Arts

Born on February 22, 1948, in Noda City, Chiba Prefecture, Ishizuka Sensei developed a deep passion for martial arts from an early age. His training included kendo, karate, judo, aikido, and Shorinji Kenpo before fate led him to his lifelong study of ninjutsu.

During high school, an injury sustained during a judo match brought him to a local bone clinic—where he met Masaaki Hatsumi, the man who would become his mentor and guide in the ways of the nine schools. In 1966, Ishizuka joined Hatsumi Sensei’s dojo and embarked on what would become a 60-year journey into the deepest traditions of Japan’s ancient martial arts.

Mastering the Art of Ninjutsu

Despite his background in multiple martial arts, Ishizuka found Bujinkan techniques uniquely challenging. He embraced the difficulty, forging his body and mind through rigorous training. He even commissioned local blacksmiths and carpenters to create custom bo, bokken, and shuriken for practice. His dedication saw him develop a reputation as one of the most skilled and disciplined practitioners in the art.

His efforts were recognized when, in 1971, he received Menkyo Kaiden (full transmission) in Kukishin Ryu. By 1978, he had achieved the same in all eight traditions studied within the Bujinkan.

Ishizuka Sensei was also an influential teacher for many foreign practitioners who traveled to Japan seeking authentic training. His fluency in English made him one of the key instructors responsible for introducing ninjutsu to the world.

A Career of Service and Leadership

In addition to his martial arts career, Ishizuka graduated from Kokushinkan University Faculty of Law in 1970 and went on to serve as a firefighter. Rising through the ranks, he eventually became Chief of the Noda City Fire Department. His dedication to service was further recognized in 1990, when he became a member of the Tokyo Firefighters Organization, later receiving their highest honor.

In 2019, Masaaki Hatsumi appointed Ishizuka as Soke (Grandmaster) of Gyokko Ryu, ensuring that this legendary tradition would continue under his expert guidance.

A Global Influence

Ishizuka Sensei’s martial arts journey took him across the world. He taught seminars in the United States, Canada, Israel, and Europe, spreading his knowledge and deepening the understanding of traditional Japanese bujutsu. His appearances in books and instructional videos with Hatsumi Sensei during the 1980s helped fuel the global ninjutsu movement.

Even in his later years, he remained committed to the art, publishing his first book, Gyokko Ryu: Legacy & Techniques, in 2024—a blend of history, personal memoir, and technical manual detailing the essence of his teachings.

Tributes from Around the World

Following the news of his passing, tributes poured in from students and martial artists worldwide:

Peter King: "I am saddened beyond words. Ishizuka Sensei was my primary inspiration within the Bujinkan, and his memory will continue to inspire me for the rest of my life."

William Ustav: "As a kid, the image of an old Japanese master sharing invaluable lessons seemed unattainable—until I met Ishizuka Sensei. He made that dream a reality for so many of us."

Mark Spada: "I feel honored and blessed to have learned from Ishizuka Sensei in Japan. His generosity, patience, and skill shaped all of us."

Mohamed Moustaine: "He had this magical way of teaching. When he said ‘Experience!’ we knew we were in for a challenge, and we grew from it every time."

Beyond the Dojo: A Life of Passion

Outside of martial arts, Ishizuka had a deep love for Hawaiian music. As a talented musician, he performed across Japan with his band, bringing joy to audiences with his passion for melody and rhythm.

Despite his long illness, he continued to be involved in both martial arts and community service. In 2024, he had planned a two-day seminar at Honbu Dojo, but his deteriorating eyesight forced its cancellation.

A Lasting Legacy

Ishizuka Tetsuji leaves behind not only a legacy of martial arts excellence, but also a global community of students and admirers who will carry forward his teachings. His impact on Gyokko Ryu, the Bujinkan, and traditional Japanese martial arts cannot be overstated.

He is survived by his wife, Mako, and children, Mai, Sai, and Aki.