Bizen Saburō Kunimune

Bizen Saburō Kunimune and His Alternate Name

"Bizen Saburō Kunimune" is a title that shines especially brightly in the history of the Japanese sword. "Saburō" is not his real name but a common appellation meaning "third son." Kunimune was the third son of the Bizen smith Kunizane, which is why he was called "Bizen Saburō." Along with this name, Kunimune's name has been remembered down to later generations, and he is highly regarded as a representative smith of Bizen in the mid-Kamakura period.

In the mid-Kamakura period, Bizen Province (present-day southeastern Okayama Prefecture) flourished as the center of Japanese sword production, with many smith groups rising up in places such as Osafune, Ichimonji, and Fukuoka. Bizen had three essentials: abundant iron sand, high-quality charcoal, and shipping on the Seto Inland Sea. It was truly an environment that could be called a paradise for smiths. Kunimune, rooted in this Bizen soil, made swords while belonging to the Naomune school, a line separate from the Ichimonji and Osafune schools.

Kunimune's Style and Technique

The style of Bizen Saburō Kunimune can be summed up as "bold yet refined." The mid-Kamakura period was a time when warrior culture had matured and the warrior's aesthetic sense toward the sword had grown stronger, and swords were demanded as works of art that went beyond mere weapons. Kunimune answered this demand admirably.

The jigane is based on the densely forged ko-itame-hada characteristic of the Bizen tradition, with larger itame grain flowing here and there. Ji-nie is evenly distributed, and the overall jigane has a moist, healthy quality. This "sound Bizen jigane" is the fundamental beauty of Kunimune's works, and it also forms the root of the Bizen tradition that the later Osafune school inherited.

The hamon is mainly chōji-midare in nioi-deki, and midare-utsuri stands across the ground. The bōshi is either small and round or pointed and round, with a relatively deep turnback. There are also surviving lively works in which the activity of the hamon extends even into the bōshi.

The form of the tachi shows the typical mid-Kamakura style. It has shinogi-zukuri construction and an iori-mune, and its curvature is koshi-zori, drawing an elegant curve whose curve becomes shallower toward the tip. The body is broad, and the kissaki is ikubi-kissaki. The small difference between the width at the base and the width at the tip is also a feature of the mid-Kamakura period. This gives a straightforward, forceful strength that differs from the supple, deep curvature of the later period.

Relationship with the Ichimonji School and Technical Background

Among the Bizen smith groups, Kunimune belonged to the Naomune school and was separate in lineage from the Ichimonji school. Although he shares with the Ichimonji school the production of chōji-midare, his powerful style, combined with his bold tachi form, sets him apart.

At the same time, Kunimune fully mastered the technical essence of the Bizen tradition and then developed it in his own way. The features of the Bizen tradition, namely "soundness of the steel surface," "evenness of the ji-nie," and "richness of activity within the hamon," are fully displayed in Kunimune's works. In that respect, he can be considered a true bearer of the orthodox Bizen tradition.

It is also said that Kunimune moved to Kamakura by way of Kyoto, and that in Kamakura he transmitted his techniques to Shintōgo Kunimitsu. He is therefore regarded as one of the smiths involved in the establishment of the Sōshū smiths.

Extant Works and Evaluation

Few extant works by Bizen Saburō Kunimune survive. However, four tachi preserved at Nikkō Tōshō-gū, Terukuni Shrine, and other places have been designated National Treasures, which demonstrates their high artistic value. Several works designated Important Cultural Property are also known, and they still hold an important place in the study of sword history today.

The signatures on the signed works designated as National Treasures or Important Cultural Property are mostly the two-character inscription "Kunimune."

Kunimune's Legacy and TOUKENZA

What Bizen Saburō Kunimune left behind is not merely individual masterpiece swords. His works showed that the Bizen tradition could encompass diverse beauty: not only the splendor of Ichimonji, but also strength and refinement. This diversity is one of the reasons the Bizen tradition has had the broadest influence in the history of the Japanese sword.

TOUKENZA introduces the Shokudaikiri Mitsutada, a masterpiece of Bizen swords, as the beloved sword of Date Masamune, and cherishes the long tradition and diverse beauty of Bizen swords behind it. As a symbol of that diversity, the sword of Bizen Saburō Kunimune still speaks to us today of the pride of Bizen swords and the spirit of the Kamakura warriors. The beauty of these swords, passed down together with the name "Bizen Saburō," is sure to move the hearts of present-day enthusiasts across the ages.