The July 1958 issue of Jitsuroku Kengo Meishobu-den (実録 剣豪名勝負伝 / True Record of Master Swordsmen’s Famous Duels) preserves a rare historical milestone in mid-20th-century martial arts literature: an extensive four-page masterclass essay authored by 14th Generation Kōga-ryū Ninjutsu Headmaster Fujita Seiko (藤田西湖).

Titled “Shurikenjutsu is an Independent Martial Art” (手裏剣術は独立した武術), the feature expands upon page 114 to separate tactical weapon craft from standard pop-culture fiction. Fujita leverages historical combat traditions to frame blade-throwing as an isolated, standalone warrior discipline rather than a basic offshoot of secondary ninjutsu skills.

Ryūha Analysis: The publication provides detailed dimensions, structural design weights, and profiles for traditional throwing spikes utilized across historic factions—specifically detailing the signatures of Negishi-ryū, Shirai-ryū, and Yagyū-ryū lineages.
Throwing Dynamics: Features clean hand-drawn instructional plates illustrating the physical mechanics behind both direct straight-flight paths (直打法) and calculated rotation throws (回転法).