The martial arts community is deeply saddened by the death of respected Bujinkan instructor Simon Yeo, a 15th-degree black belt and Dai Shihan whose lifelong dedication to training, teaching, and sharing knowledge touched students around the world. After decades immersed in the traditions of Bujinkan Budō Taijutsu—alongside achievements in Brazilian Jiu-Jitsu and other disciplines—his passing following illness has prompted an outpouring of heartfelt tributes from friends, practitioners, and those who trained under his guidance.

From early journeys to Japan to study with Grand Master Masaaki Hatsumi, to authoring influential writings on ninjutsu and mentoring generations of students, Simon’s legacy reaches far beyond the dōjō. We remember not only a highly skilled martial artist, but a generous teacher, a gentleman, and a friend. Read the full tribute to explore his life, training, and the memories being shared in his honour.