Kaneie is celebrated as the founder of pictorial-style (eshi-) , active in Fushimi, Yamashiro Province during the period. His work represents a decisive break from the purely functional iron guards that preceded him, establishing the as a vehicle for sophisticated pictorial expression. In addition to standard plate forms such as , , and , he devised highly original shapes — among them futatsu- and — designing each work so that subject and plate form would mutually enhance one another. His oeuvre reflects a deep engagement with Zen-inflected literary and religious themes, including Daruma and the parable of the monkey grasping at the moon's reflection.
Kaneie's plates are consistently forged of iron to an exceptionally fine standard. He characteristically finished the ground with (hammered texture), imparting an understated elegance that serves as the tonal foundation for his compositions. His carving method is powerful and assured, combining (high relief) with usuniku-bori (low relief) and incisive (fine-line engraving), while colored inlay and in gold and silver are applied with deliberate restraint. This economy of precious metal heightens both the chromatic contrast and the pictorial refinement. His compositions employ perspective to open broad spatial fields, placing emphasis on the layers of air that fill the pictorial space and achieving an elevated, dignified tone throughout.
Kaneie's contribution lies in demonstrating that the iron could attain the status of a self-contained pictorial art. His characteristic interplay of forceful relief carving, restrained metalwork, and contemplative subject matter established a standard against which later generations of pictorial guard makers would be measured. His works are held in the highest scholarly regard and remain essential reference points in the study of Japanese sword-fitting art.