Kanenaga (兼長), known in the Kenchō reading, is transmitted as a disciple within the school of Chōgi (長義), active during the period in Province. Extant signed works are exceedingly few: the earliest dated example is a of Jōji 5 (1366), designated an Important Art Object, which displays a fully -like manner of workmanship. Two further signed survive, dated Shitoku 4 (1387) and Kakei 2 (1388), the latter itself a designation. These pieces exhibit (沸) that is markedly stronger than the , with abundant activities in both and ; as the consistently observes, while they approximate Chōgi's manner, "they are noteworthy for presenting a workmanship in which the tradition is emphasized even more strongly." From both the workmanship and the calligraphic style of the inscriptions, the traditional transmission of Kanenaga as Chōgi's student is affirmed. In the case of , the great majority are blades established by appraisal (), and from old times pieces of a certain character have been assigned specifically to this smith.
The forge work () characteristically shows (板目肌) mixed with (杢目) and areas of , tending toward standing grain (); fine adheres well, (地景) enters, and a faint appears — a persistent hallmark across attributed examples. The (刃文) typically centers on mixed with , angular elements, pointed tendencies, and the distinctive "open-at-the-waist" () forms, producing what the terms a "brilliant, flamboyantly irregular" temper. Activities are rich: and enter profusely, (金筋) and run through the temper, and in the more vigorous examples and are interspersed, with the tempering rising so high as to approach the . The frequently enters in , often with producing a flame-like () effect described as "full of force." Compared with his teacher Chōgi, the repeatedly notes in Kanenaga a quality that is "a step more animated and bustling," with "a bolder freedom in the way the hardened edge is taken" — the thicker and at times coarser, the internal activity more vigorous, the overall impression one of uninhibited energy rather than Chōgi's more controlled brilliance.
This positioning between - and Sōshū-den — what the examiners identify as Sōden-Bizen — defines Kanenaga's significance within the tradition. The describes his finest work as possessing "the brilliance and strength characteristic of ," yet with a emphasis that surpasses even Chōgi's. One early observes that the Kakei 2 "could be mistaken for a work," while another notes that attributed display "a more technical manner than Chōgi." The evaluative language is consistently one of power: "dignified," "imposing," "filled with spirit," "grand and sumptuous brilliance." Blades in sound condition () with ample substance () receive particular praise, conveying what the examiners describe as "robust strength." Yet a scholarly question persists: one candidly notes that the typical differ from the signed and that "there remains room for research as to whether they are indeed by the individual." This acknowledgment underscores both the rarity of Kanenaga's authenticated oeuvre and the enduring esteem in which his attributed work — bold, flamboyant, and forceful — is held.
