The May 1961 issue of Argosy Magazine (Volume 352, Number 5) featuring the historic photo-article “Art of Invisibility” photographed by Ray Falk. This entry documents one of the earliest Western media profiles on Masaaki Hatsumi (credited as Yoshiaki Hatsumi) and traditional Togakure-ryu Ninjutsu, detailing historical ninja weaponry, tactics, and martial arts heritage.