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Reviewing Hisshō no Heihō. Tracking a lifetime of lineage training: Nawa’s original promotional marketing text proudly references 55 years of deep martial research. Born into a prominent samurai family in 1912, Nawa began his immersion into ancestral weapon scrolls and private manuscripts at roughly five years of age (1917). This book represents the complete gathering of those five decades of private, unbroken lineage study. Through a detailed forensic dissection of martial myth, Nawa weaponized his unique “scientific approach” in this volume to systematically dismantle commercialized cinematic fantasies. Using physical engineering principles, he famously debunked the popular trope of “walking on water” with Mizugumo (Water Spider) shoes, providing structural proof that they were swamp-crossing devices. The text serves as a cold, practical analysis of medieval espionage logistics, breaking down the exact body mechanics of an eccentric master across its pages.

The rare black-and-white plates features Nawa Yumio personally modeling operational gear and executing high-level physical counters. His posture reveals a highly distinct lateral pelvic turnout and precise, elongated finger extensions. These physical markers provide absolute proof of his pre-war background as a professionally trained Western-style classical ballet dancer “yōbuga”. To preserve the material culture of the Shinobi, every photographic flat-lay and technical ink illustration inside Hisshō no Heihō was arranged directly from Nawa’s private collection. The book features scarce, early public documentation of the Sendai Domain’s Karasu-gumi (Crow Group) uniform—complete with hidden iron-lattice chainmail “kusari” sewn directly beneath the dark outer cloth to defeat ambush cuts while maintaining absolute tactical silence during nighttime operations.

A legendary promotional crossover exists within this specific publication: The original red obi strip lists this volume as part of a premier martial arts series, explicitly marketing Nawa’s work alongside titles by Fujita Seiko (藤田西湖)—the iconic “Last Koka Ninja”. This marketing detail cements the historical status of Hisshō no Heihō in 1972 as the absolute primary authority carrying the torch of legitimate historical espionage research into the modern era.

Rare & Unusual Facts About the Author and Book:

The technical interior schematics explicitly verify this academic authority through precise weapon breakdowns and rare archival scroll photography. Nawa shares full-length photographic plates reproducing the highly restricted text of the historical Ninjutsu secret scroll known as Murasame Taihō no Maki “村雨大砲の巻”, exposing early modern tactical firearms and gunpowder strategies. This primary source evidence is matched by comprehensive structural illustrations of diverse shuriken variants, detailing specialized variations ranging from heavy, multi-faceted star blades (tetsubishi) to elongated, double-pointed throwing spikes (bo-shuriken). The manual further explores tactical field equipment by providing mechanical schematics for historical water crossing apparatuses, including specific canvas dimensions for turtle-shell rafts (kame-ikada) and the exact floatation ring layout derived from the historic Bansenshūkai scrolls for water spiders.

Furthermore, Nawa utilizes specialized action photography to model the legendary sword scabbard maneuvers known traditionally as Sageo Shichijutsu “下緒七術”, documenting seven classical methods for deploying a sword’s scabbard cord for combative utility. These include step-by-step performance metrics for executing the rapid drawing strike known as Yōjin-nawa no Nukichi-giri “用心縄の抜き打ち斬り” to execute immediate drawing strikes using a security cord, alongside the unique darkroom scouting method called Zasagashi no Jutsu “座さがしの術”, a method for stealthily scanning dark rooms using the sword guard as a sensory extension.

Additional plates inside Hisshō no Heihō break down tactical retreat movements like the highly deceptive backward evasion stride known as Ushiro-zuri “後ろ走り”, which utilizes masks on the back of the head combined with fire-breathing distractions to confuse pursuers, and the precise spear-stopping counter system known as Yari-dome no Jutsu “槍止めの術” for countering incoming spear thrusts. These tactical applications are supplemented by ink drawings illustrating advanced group wall-scaling formations (ninin-ba, sannin-ba), escape techniques using deceptive smoke screens (kasumi no jutsu), and precise methods for utilizing dynamic body weights to execute grappling throws over an opponent’s shoulders. To secure communications, the text provides a dedicated visual breakdown of cryptographic signaling materials, outlining the authentic preparations for multi-colored code grain (goshiki-mai) alongside defensive field restraint tools such as weighted pocket chains (manriki-kusari) and angular pocket irons designed for covert counter-offensive strikes.