Bunka–Bunsei Era

Late-Edo Cultural Flourishing and Japanese Swords

The periods designated by the era names Bunka (1804–1818) and Bunsei (1818–1830) represent an age when, under the political stability of the Tokugawa shogunate, Edo's townspeople culture blossomed most abundantly. Diverse cultural expressions—haiku, popular fiction, ukiyo-e prints, kabuki, and comic linked verse—underwent explosive development, and networks of intellectuals, literati, and connoisseurs functioned vigorously. Within this cultural soil, Japanese swords, too, became objects of passionate research and collecting as pure "subjects of scholarly pursuit" and "artistic masterpieces to be assembled into collections."

In the field of sword study, while inheriting the tradition of authentication established by the Honami family, new movements emerged seeking more academic and systematic approaches. Sword treatises proliferated—texts that classified and recorded the characteristics of sword forms, blade patterns, and forged steel. It was during this era that the foundations of modern sword scholarship were laid.

Suishinshi Masahide and the Restoration Movement

The figure essential to any account of Bunka–Bunsei sword history is Suishinshi Masahide (1750–1825). Working in Edo, Masahide adopted a critical perspective toward the techniques mastered by contemporary smiths—the techniques of "Edo shinshintō," particularly the bright, clear Osaka-derived jigane and nioi-based hamon. He advanced a "restoration theory of sword studies," arguing that smiths must "return to Kamakura-period kotō."

In his writings, notably "On the Discernment of Swords," Masahide argued that the true beauty of swords lay in the complex forged skin textures of kotō jigane—a mixture of mokume, itame, and masame patterns—and the deep, substantive nie and nioi of the blade. This argument found wide support among contemporary smiths, connoisseurs, and literati, giving birth to a new current known as "shinshintō." Shinshintō refers to swords made during the Edo period that consciously restored and perpetuated the techniques of Kamakura- and Muromachi-period kotō.

Koyama Munetsugu and Taikei Naotane

The students who received instruction from Suishinshi Masahide came to lead the sword world from the Bunka–Bunsei era onward. Particularly crucial among them were Koyama Munetsugu and Taikei Naotane.

Koyama Munetsugu originated from Shirakawa in Mutsu Province (present-day Fukushima Prefecture) and became a preeminent master of shinshintō who faithfully inherited Masahide's restoration theory while achieving heights of his own. His forging of jigane was especially excellent; in the complex interplay of small itame and small mokume patterns, landscape features emerged in the steel that masterfully reproduced the atmosphere of kotō. His blade patterns excelled in straight-edged and small-undulating forms created with nie, earning such high praise that he came to be called "the finest in the Kantō region."

Taikei Naotane (1779–1857) originated from Dewa Province (present-day Yamagata Prefecture) and, as a direct student of Suishinshi Masahide, legitimately inherited the restoration techniques. He conducted research into the characteristics of various traditional schools and excelled in the technique of "utsushi" (reproduction), deliberately recreating diverse styles such as Bizen, Soshu, and Yamashiro schools. Such breadth and high level of technical accomplishment earned him mention in the saying "Taikei in the east, Minamoto Kiyomaro in the west."

The Connection Between Sword Connoisseurship and Literati Culture

The sword boom of the Bunka–Bunsei era transcended mere technical innovation by smiths, becoming a broad cultural phenomenon that crossed the boundaries of samurai, merchants, literati, and connoisseurs. Collections of oshigata (ink rubbings of blade surfaces) became fashionable; essays and scholarly treatises on swords were produced in great numbers. Ancient kotō swords were unearthed from the storehouses of daimyo and samurai households, re-evaluated, and celebrated in literati salons, where celebrated named swords became subjects of spirited discussion.

Within this cultural context, swords came to be recognized not as weapons but as "historical artworks and cultural artifacts," and the modern perspective that would underpin Meiji and later efforts toward "the treatment of Japanese swords as fine art" and preservation activities was cultivated during this era.

Place in Collections

Swords of the Bunka–Bunsei era, particularly fine works by Suishinshi Masahide, Koyama Munetsugu, and Taikei Naotane, frequently receive designations such as Important Sword or Special Preservation Sword in NBTHK examination. Among shinshintō, swords of this era show the greatest affinity with kotō and represent an especially suitable subject for developing one's eye for appreciation. For collectors for whom acquiring genuine kotō is difficult, these works offer one of the optimal paths to experiencing the aesthetic sensibility of kotō in an accessible form.