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Ninjutsu Shoseihō Volume Overview

Published in 1963 during Japan’s rapid post-war economic boom, Ninjutsu Shoseihō represents a fascinating cultural crossover. Released as part of Yomiuri Shimbun-sha’s iconic Salaryman Books series, this unique strategy manual directly targeted Tokyo’s booming population of white-collar workers.

Popularly known as “Salaryman Ninpō” (Corporate Ninja Arts), the book cleverly applies classical feudal espionage principles to modern workplace survival. Rather than physical combat, the text explores how classical tactics of stealth, strategic silence, information gathering, and misdirection can be deployed to navigate competitive corporate hierarchies, office politics, and challenging professional dynamics.

Author Signature & Inscription

This exceptional collector’s copy features a hand-signed, brush-ink calligraphic dedication by the author, Okuse Heishichirō. The inscription reads: “忍術は虚実の学なり” (“Ninjutsu wa kyojitsu no gaku nari”).

This translates directly to “Ninjutsu is the study of reality and illusion” (or truth and falsehood). Rather than highlighting physical combat, this specific maxim represents the psychological core of genuine Iga espionage, emphasizing that perception management, informational warfare, and misdirection supersede raw force.

Historical Significance & Insights

A Contradictory Masterpiece: While marketed as a lighthearted guide for corporate employees to survive office politics, Okuse filled the pages with authentic, grim tactical concepts pulled directly from historical Iga manuals, resulting in a fascinating blend of mid-century corporate satire and genuine martial arts history.

The “Ninja Mayor” of Iga: The author, Okuse Heishichirō, was far more than an academic writer; he served as the official Mayor of Ueno City (the historical capital of Iga, now Iga City) from 1969 to 1977. While in office, he single-handedly pioneered modern ninja heritage tourism by establishing the region’s first dedicated museum.

Discovered by Ryōtarō Shiba: Okuse’s research career began purely by chance when he shared his private family scrolls with the legendary historical novelist Ryōtarō Shiba, who was working as a newspaper cultural editor. Shiba recognized the immense historical value of the documents and personally pushed Okuse to publish them.

The Blueprint for Modern Ninja Media: Okuse’s 1960s texts served as the exact underlying source material used by playwright Tomoyoshi Murayama to write the massive novel and movie series Shinobi no Mono (忍びの者). Almost every ninja trope about historical ninja in global pop culture today traces directly back to Okuse’s findings across books like Ninjutsu Shoseihō.

Final Verdict & Academic Impact

This rare 1963 printing remains an indispensable technical asset for specialized historians, rare book collectors, and researchers tracking mid-century Japanese corporate culture and martial lineages. Because the content preserves raw Iga espionage strategies framed uniquely as workplace navigation tactics, the socio-historical value found within Ninjutsu Shoseihō provides an irreplaceable reference point. It is a vital addition for any library archiving the intersection of traditional martial philosophy and post-war Japanese publishing history, documenting the precise era where secretive historical traditions successfully transitioned into mass-market pop culture landmarks.