Kaneshige is traditionally counted among the Ten Disciples of Masamune and is regarded, together with Kaneuji, as a foundational figure in the origins of the forging tradition. His original home province was , at Tsuruga; he later moved to , where he exerted great influence on subsequent generations of smiths. There were several generations working under the Kaneshige name, yet from the first generation onward signed works are exceedingly few. Among judged to be by the first generation, no signed examples whatsoever are known to survive; only a single bears an extant signature that can be regarded as unquestionably reliable.
In comparison with the group of the Kaneuji lineage, Kaneshige's works show a more pronounced standing grain in the -- a distinctive quality that is one of the primary diagnostic features. Where the school tends toward pointed , Kaneshige characteristically produces in which the heads are somewhat rounded, formed in a continuous series rather than sharply peaked. His tempering encompasses mixed with and , as well as calm patterns; among signed , examples in are also found. adheres well and the is bright, yet overall his work is more subdued in tone than that of the line. A hokkoku- -- a northern provinces character -- has been recognised in the texture of the in certain works, reflecting his origins.
The appraisals consistently distinguish Kaneshige from the group, noting that his character differs in ways that warrant separate attribution. Despite the near-total absence of reliable signed long blades, the recurring evaluative standard is that works displaying the distinctive combination of standing grain, rounded tempering, and a calmer overall impression than the school can be readily accepted as representing his hand or his direct lineage. Several designated blades are recognised as upper-ranked works within the tradition, and their sound condition further attests to the quality and enduring importance of this foundational school.