04/03/2026
"To explain the style of combat advocated by Katori Shintō-ryū, I must first briefly describe defensive weaponry. Defensive weaponry, which has developed in tandem with offensive weaponry as its counter, includes the use of regional climatic conditions, available local resources, and man-made defensive equipment.
Fortresses and other such facilities are common examples of the use of local resources or terrain. Similarly, shields are one form of highly mobile defensive equipment; they then evolved into armor that could be wrapped around the human body like clothing.
To defend from enemy assaults, humans are said to have wrapped themselves in pelts or worn wooden armor made of interlaced bark. By the Kofun period (ca. 300-710 A.D.), the early varieties of Japanese armor called tanko and keiko were already largely perfected.
In Japan, armor is known by a variety of terms, including katchū, yoroi-kabuto, and kabuto-yoroi, depending more on the period in which it was referenced than differences in design.
Whether referred to as tankō, keikō, ōyoroi, dōmaru, hara-ate, hara-maki, gusoku or other terms, as the face of warfare changed through the ages, Japanese armor kept pace to reach ever-greater levels of freedom of movement and efficient shape.
I mentioned earlier that the ultimate goal of warfare is to achieve victory without resorting to conflict. The key to successfully achieving this goal is to have an unequalled advantage over the enemy in terms of combative technology, weaponry, and psychology, and to be always one step ahead in terms of intelligence. Thus, we must have a thorough knowledge and understanding not only of offensive weaponry, but of defensive weaponry as well.
Japanese armor has as much artistic value, utility, and presence as the Japanese sword, and is a formidable product of the best in technologies.
However, Japanese armor has, for the sake of greater ease of movement, unavoidable and exposed weak points, and it is this design defect that is targeted by the omote set of sword techniques in Katori Shintō-ryū."
Source: Risuke Otake, Katori Shintō-ryū - Warrior Tradition, New Jersey, Koryu Books (2007)
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