In the late 1980s and early 1990s, Grandmaster Masaaki Hatsumi, inheritor of nine martial arts schools and a lineage spanning over 1,000 years, authored a series of newsletters to serve as a useful guide and reference for maturing martial arts students around the world. The articles contained within Tetsuzan ("Iron Mountain") are diverse: interviews with "The Last Combat Ninja" Soke Toshitsugu Takamatsu, the symbolic back-story of the TV show Jiraiya,...