Kanbun Shintō

From Military Rule to Civil Governance — Social Change and the Shift in Sword Aesthetics

In the early Edo period, from Keichō (1596–1615) through Genna (1615–1624) and Kan'ei (1624–1644), swords still retained their character as weapons intended for actual combat. The memory of the Ōsaka campaigns (1614–1615) was still fresh, and samurai sought swords with the possibility of actual fighting in mind. However, as the Tokugawa regime stabilized and an era of “peace” (taihei no yo) became a reality, the role of the sword shifted its emphasis from actual combat to a symbol of samurai identity.

This change crystallized most clearly in the transformation of sword style during the Kanbun (1661–1673) period. This style, called “Kanbun Shintō,” changed its appearance entirely from the bold and generous overall proportions of the earlier “Keichō Shintō” to an orderly, balanced beauty. Blade length became compact, at around 2 shaku 2 to 3 sun, and a form called “Kanbun-sugata,” with shallow sori, fusegokoro (slightly inward-leaning, nearly straight), and tightly drawn ko-kissaki, was established.

Technical Characteristics of Kanbun-sugata

The most conspicuous visual features of Kanbun Shintō are shallow sori and a small, compact kissaki. Whereas Keichō-period blades were imposing, with broad mihaba, thick kasane, and an ō-kissaki, Kanbun-sugata had shallow sori and fusegokoro, with the kissaki drawn into a ko-kissaki, forming an overall taut form. Such forms are thought to have been demanded against the backdrop of the spread of shinai training.

Innovation also occurred in the hamon. In Ōsaka, Inoue Shinkai tempered suguha with deep nioi and nie, and Tsuda Echizen no Kami Sukehiro originated tōran-midare, giving rise to hamon with deep nie that appeared bright and clear. This “bright and clear” hamon is the greatest aesthetic quality of Kanbun Shintō.

Trends in Major Production Centers

In Ōsaka, the lineage represented by Tsuda Echizen no Kami Sukehiro became famous as the leading smiths of Kanbun Shintō. Sukehiro created a hamon called tōran-midare, reminiscent of the waves of the open sea, while also being rated among the highest for the refinement of his suguha. Ōsaka prospered as “Ōsaka Shintō,” and a technique of tempering deep, bright and clear nie hamon on beautiful jigane was established.

In Kyōto, Echizen no Kami Nobuyoshi was active, and smiths from various regions embodied new sword aesthetics, including Mutsu no Kami Yoshiyuki of Tosa and Iga no Kami Kinmichi of Kyōto. A characteristic of this period is that each production center, while retaining its own regional features, developed its own Kanbun style in response to the aesthetic sensibility of the times.

Social Regulation of Sword Length and Shape

In the Edo period, the dimensions of the swords worn (sashiryō) by samurai and townspeople were also prescribed, with the aim of regulating public morals. The blade length of the uchigatana that samurai wore daily settled as a standard of around 2 shaku 3 sun, with emphasis on practical handling. The shortening of length and the rectification of form clearly show the change in the sword's position, from practical use on the battlefield to “an accomplishment of samurai living in a peaceful society.”

Collectors' Value of Kanbun Shintō

Kanbun Shintō is a period that is relatively abundant in circulation and comparatively easy to acquire, compared with kotō of the Kamakura to Muromachi periods. However, works by master smiths such as Sukehiro are traded at high prices. Because the aesthetic standard of “bright and clear hamon” is clear, it is easy to cultivate an eye for appreciation, and it is also a period well suited as an introduction to sword collecting. A single blade embodying the refined aesthetic sensibility of the early Edo period will add intellectual depth to a collection.