Ishidō Korekazu

Korekazu of the Edo Ishidō School: The Swordsmith Who Revived the Bizen Tradition in Shintō

Ishidō Korekazu was a swordsmith active in the early Edo period, and he is remembered in the history of Japanese swords as a leading smith of the Edo Ishidō school. In the Shintō period (17th century), he is known for chōji-ba aimed at the works of the Kamakura-period Fukuoka Ichimonji school, and he is ranked as a jōsaku of the Shintō period and a yoki-wazamono.

There are various theories regarding Korekazu's origins, but he is said to have been from Gamō District, Ōmi Province. His real name was Kawakami Sakon, and he is traditionally said to be a descendant of Ichimonji Sukemune of Bizen. He later moved from Kyoto to Edo and made swords there. His early name was Korekatsu, which he later changed to Korekazu. After receiving the title Musashi Daijō, he signed his inscriptions with names such as "Musashi Daijō Fujiwara Korekazu."

The Collapse and Revival of the Bizen Tradition: A Historical Mission in the Shintō Period

The Bizen tradition is a distinguished school of forging that formed the mainstream of Japanese swordmaking from the late Heian period to the mid-Muromachi period. The chōji-midare hamon and itame-hada ground steel produced by Bizen master smiths, led by Osafune and Ichimonji, were widely recognized as the epitome of the beauty of Japanese swords. However, along with the spread of mass-produced swords in the late Muromachi period that prioritized practicality, and the near-total destruction of the Bizen tradition's centers, chiefly Osafune, by a great flood of the Yoshii River at the end of the Tenshō era, the orthodox techniques of the Bizen tradition faced the threat of being lost.

In the Shintō period (17th century), as sword culture flourished again, centered on Edo and Osaka, a movement rose to recreate the beauty of kotō swords in Shintō-period blades. Korekazu responded to the demands of this era by making swords aimed at the works of the Kamakura-period Fukuoka Ichimonji school, and he demonstrated the style of the Bizen tradition in the Shintō period.

Characteristics of His Work: Reviving the Chōji-midare in the Shintō Period

The greatest feature of Ishidō Korekazu lies in his reproduction, using Shintō-period techniques, of the chōji-midare that symbolizes the Bizen tradition. His hamon, rich in variation, consists of ō-chōji hamon with nioi-deki and ko-nie, mixed with ashi and yō, and it was modeled on the Bizen hamon produced by master smiths of the kotō period.

His ground steel is often dense ko-itame-hada, with pronounced midare-utsuri, and it reveals traces of effort to reproduce the atmosphere of kotō Bizen swords. On the other hand, masame-hada appears strongly on the shinogi-ji, and the hamon becomes crowded (kozumu), which is where his work differs from that of the Ichimonji school.

The shape is shallower in sori compared with older works. His dignified style, which balances practicality and aesthetics, contributed greatly to spreading the beauty of the Bizen tradition in Edo's samurai society.

Development of the Ishidō School: Influence on Later Generations

In the Shintō period, the Ishidō school was distributed as far as Edo, Kii, Osaka, and Chikuzen. Known smiths include Korekazu and Tachibana Tsunemitsu of Edo, Tachibana Tameyasu of Kii, and Tatara Nagayuki of Osaka. The name Korekazu was passed down by succession until the Meiji period, and Unju Korekazu of the late Edo period is especially renowned as a master.

Many outstanding swordsmiths emerged from among Korekazu's disciples and successors. The movement to revive the Bizen tradition led by the Ishidō school is an important historical example showing that the tradition of Japanese swords can continue beyond the threat of extinction.

TOUKENZA and Ishidō Korekazu

TOUKENZA introduces Ishidō Korekazu as a master smith who fulfilled the historical mission of reviving the nearly lost Bizen tradition in the Shintō period. Korekazu's challenge of reconstructing the beauty of kotō swords with new techniques and sensibilities is a pioneering achievement that demonstrates the possibility that the tradition of Japanese swords can be passed down across eras as living technique.