Kaneshige (金重) has, since ancient times, been counted among the "Ten Great Disciples of Masamune" (Masamune Juttetsu). According to the Kokon Meizukushi, his Buddhist name was Doa, and he was originally a resident of Tsuruga in Echizen Province; he later relocated to Mino Province, where -- together with Kaneuji -- he "became a foundational figure in the line of the Mino smiths." The Kozan Oshigata records two tanto dated Joji 2 (1363), establishing his period of activity within the Nanbokucho era. Extant signed works are exceedingly scarce, limited to "only several blades" -- all tanto -- while no signed tachi have been confirmed until the recent authentication of a signed tachi at the 55th Juyo session, a discovery the NBTHK noted as being of considerable significance.

The NBTHK consistently distinguishes Kaneshige's manner from that of the Shizu group through several diagnostic criteria. His jigane tends to show "somewhat more standing grain" (hada-dachi) than Shizu, with itame-hada mixed with mokume and often flowing toward masame, accompanied by thick ji-nie and chikei; faint nie-utsuri frequently appears. The hamon, rather than the sharply pointed togari-gunome characteristic of Shizu, "more often takes the form of linked, gentle gunome with rounded heads" running in a connected succession. With ko-nie adhering, "the overall impression tends to be calmer than that of the Shizu group." Within this fundamental manner, Kaneshige's range is broad: some works incorporate ko-notare, kataochi-like gunome, and togariba; others show sunagashi, kinsuji, and yubashiri mixed with tobiyaki; and certain pieces display "an inclination toward hitatsura." The boshi typically enters in midare-komi or notare, frequently finishing with hakikake.

Kaneshige's position as one of the Juttetsu and a progenitor of the Mino tradition gives his authenticated works an importance that extends beyond individual quality. The NBTHK repeatedly emphasizes both the rarity of signed examples and the "documentary value" each provides for understanding the early Mino school. His finest blades are praised for forging that is "powerful with frequent chikei" and tempering of "typical and exemplary character," producing steel that is "bright in color and well refined" with nie that "sparkles" along the habuchi. Within the broader spectrum of Soshu-den influence, Kaneshige represents a distinct temperament: one of measured composure rather than exuberance, whose calm, linked gunome and richly textured jihada mark the threshold between the Soshu inheritance and the Mino tradition that would follow.