The Historical Development of Iaido — From Hayashizaki Jinsuke to Modern Practice and Its Influence on Sword Culture

What is Iaijutsu — The Essence of Quick-Draw Martial Arts

"Iaido (iaijutsu)" is a martial art that systematizes the technique of rapidly drawing the sword from its sheath and controlling the enemy. It is not merely "the skill of drawing a sword quickly," but rather encompasses physical and spiritual training in a series of coordinated movements: nukitori (drawing), kiriage (cutting), zanshin (remaining consciousness), and nouto (sheathing the sword).

Regarding the etymology of "iaido," there are multiple theories, but the common interpretation is that it means to "respond" or "adapt" from a state of being seated or in position (the meaning of "iru" — to be/exist/maintain readiness). During the Edo period, iaido was a practical martial technique for samurai to prepare for unexpected conflicts indoors or while seated, and simultaneously served as a form of spiritual cultivation. It is deeply connected to the philosophy of "ritou no ri" (the principle of controlling without drawing the sword), and iaido represented a place for the physical practice of bushido philosophy.

Hayashizaki Jinsuke Shigenobu — The Founder of Iaijutsu

The widely recognized founder of iaijutsu is Hayashizaki Jinsuke Shigenobu, who was active in the late 16th century. He is said to have been connected to the Hayashizaki Shrine (present-day Hayashizaki Iaido Shrine, in Murayama City, Yamagata Prefecture) in Dewa Province (present-day Yamagata Prefecture), and legend has it that he vowed to avenge his father's death by praying to and training in the art of quick-draw under divine guidance.

The "Shimmuso Hayashizaki-ryu" founded by Shigenobu later spread throughout the Kanto and Tohoku regions, giving rise to many branch schools. The following are particularly significant lineages:

• Tamiya-ryu
• Sekiguchi-ryu
• Muso Jikiden Eishin-ryu
• Musou Shinden-ryu

These schools were transmitted to samurai throughout various domains, and each developed its own distinctive forms and philosophies. The Hayashizaki lineage is said to have developed into over 70 schools that survive to the present day.

Edo Period Development — From Actual Combat to Form Practice

Following the end of the Sengoku period and the establishment of the Edo shogunate in 1603, Japanese society transitioned to a stable era of peace. As opportunities for actual combat diminished, martial arts transformed into a discipline of "kata (form) training" for the preservation and transmission of techniques, as well as a place for spiritual cultivation. Iaido also underwent this transformation, shifting from a practical combat martial art to one emphasizing the aspects of "samurai etiquette and spiritual discipline."

From the mid-Edo period onward, iaido schools spread throughout the nation, and training was conducted in dojos across various domains. During this period, many "forms" were systematized and recorded in transmission texts specific to each school. In martial arts, "form" is not merely a manual of movements, but rather a crystallization of the experience, wisdom, and philosophy of one's predecessors—a "living cultural heritage" transmitted from teacher to disciple through oral instruction. Through iaido training, practitioners refined not only their handling of the sword but also courtesy, spirit, concentration, and the ability to sense the atmosphere of a space.

Meiji and Taisho Periods — Modernization of Martial Arts and the Transformation of Iaido

Following the Meiji Restoration in 1868, the Edict prohibiting the wearing of swords (1876) made bearing arms unlawful for samurai, and iaijutsu lost its practical application. However, within efforts to preserve martial arts as culture and physical education, iaido was redefined as a complement to kendo and as spiritual cultivation, surviving as a modern martial art.

During the Taisho period, discussions regarding the standardization and systematization of various schools began, laying the groundwork for the formation of organizations transcending individual schools. During this time, attempts were made to systematize "standard forms" that would become the prototype of modern iaido, and initiatives toward the social popularization of iaido commenced.

Modern Iaido — Coexistence of All Kendo Federation Iaido and Classical Schools

After World War II, the All Japan Kendo Association established "All Kendo Federation Iaido" (standardized iaido) in 1969, defining common forms nationwide. This standardized iaido is a common program that can be learned regardless of school affiliation and is also used in rank examinations.

At the same time, classical schools such as Muso Jikiden Eishin-ryu, Musou Shinden-ryu, Tamiya-ryu, and Sekiguchi-ryu have been passed down to the present day, and many practitioners train in both standardized iaido and classical schools. The practicing population of iaido in Japan is estimated to number in the tens of thousands, and enthusiasts are also increasing overseas, particularly in the West and Australia.

Iaido and Japanese Sword Culture

Iaido is one of the most important "living connections" to Japanese sword culture in the modern era. Training involves the use of actual swords (practice iaido swords or real blades), and practitioners learn the functions and names of various sword components—the saya (sheath), tsuka (handle), mekugi (peg), and koiguchi (mouth of the sheath)—through physical experience. Practitioners of iaido naturally develop deeper interest in swords, and it often becomes an entry point into collecting.

Enthusiasts who have learned the basics of Japanese sword preservation, maintenance, and handling through iaido can evaluate both the practical feel and artistic value of a sword when selecting from sword markets or online catalogs. TOUKENZA's online catalog features a wide range of swords, from those suitable for iaido practice to masterpiece blades as works of art, and serves collectors with backgrounds in iaido. In modern times, the number of examples where those who enter the world of iaido begin a Japanese sword collection as their next step continues to increase.

The swords used in iaido practice are divided into "practice iaido swords" and "real swords." Beginners start with practice swords for safety, but as rank increases, the transition to real swords is often encouraged. Training with real swords brings a sense of tension and responsibility, creating a place where deep respect and understanding for blades develops. By physically experiencing the weight, center of gravity, and curvature of a real sword, one's understanding of the structural and functional beauty of Japanese swords deepens dramatically.