Shizu Kaneuji

Shizu Kaneuji was a swordsmith active from the late Kamakura period through the early period of the Northern and Southern Courts, founder of the Mino Shizu school, and counted among the celebrated craftsmen known as one of the "Masamune no Jittetsu" (the ten great disciples of Sōshū Masamune). His common name was Saburō, and he was called "Shizu Saburō Kaneuji."

Originally belonging to the Tegai school of Yamato Province, he is said to have studied the Yamato tradition under the name "Kaneuji (包氏)." Eventually, he went to Sagami Province to study under Masamune and is said to have mastered the Sōshū tradition. Thereafter, he moved to Shizu in Mino Province (present-day vicinity of Minō-chō, Kaizu City, Gifu Prefecture), adopted the name "Shizu" based on the place name, and changed his signature character from "包" (kane) to "兼" (kane), becoming known as "Kaneuji." Thus Kaneuji unified the solidity of the Yamato tradition with the refinement of the Sōshū tradition in his own person, establishing the foundation of Mino smithing. Regarding the Masamune no Jittetsu, there are also views that not all were direct disciples of Masamune based on chronological considerations, and regarding Kaneuji as well, there are various theories about the master-disciple relationship.

His style is characterized by workmanship centered on nie, based primarily on the Sōshū tradition. The hamon features notare as the foundation, interspersed with gunome and pointed blades, with thick nie adhering and prominent kinsuji and sunagashi appearing in the blade. The jihada exhibits itame mixed with masame-tinged texture deriving from the Yamato tradition, with good jinie and examples displaying jikei and white utsuri. On the other hand, before entering Masamune's tutelage, he is said to have forged gunome-based hamon with somewhat smaller patterns, his output exhibiting considerable variety. There are also works said to closely resemble those of his master Masamune in both jihada and hamon, suggesting his high level of skill.

Signed works that can be confirmed are scarce; most bear a two-character signature reading "Kaneuji," though longer signatures such as "Kaneuji, resident of Mino Province" are occasionally seen, and works dated to Kōei 2 (1343) are also known. Representative works include the short sword "Inaba Shizu," listed in the Kyōhō Meibutsuchō and designated an Important Cultural Property (named after its former ownership by the Inaba samurai family of western Mino), and the renowned blade "Togawa Shizu" (unsigned, housed in the Tokugawa Art Museum). Many are unsigned and have been later attributed as "Shizu" or "attributed to Shizu" (den-Shizu), with authentication certificates affixed and valued accordingly.

After Kaneuji's death, his followers Kanetoshi and Kanetomo and others moved to Naoe in Mino Province (present-day vicinity of Ōgaki City, Gifu Prefecture) and flourished under the name "Naoe Shizu." The standard distinction is between the original Kaneuji and his direct lineage, termed "Shizu," and the later branch, termed "Naoe Shizu." Shizu Kaneuji is highly regarded as an extremely important figure in the history of Japanese swordcraft, having rooted the Sōshū tradition in Mino and becoming the fountainhead of the Mino tradition that would lead to the later Sekigane smithing.