Kawachi no Kami Kunisuke (河内守国助) encompasses two generations of Osaka smiths who together defined one of the most influential lineages in swordmaking. The first generation (), like his contemporary Izumi no Kami Kunisada, was "among the last disciples of the group," though the consistently notes that "judging from the style of his early works and the manner of his signatures, it is conjectured that his de facto teacher was Echigo no Kami Kunitsugu." After Kunihiro's death, Kunisuke moved to Osaka together with Kunisada, "becoming a pioneer among the Osaka smiths and exerting a major influence upon later Osaka swordmaking." He likely received his court title around Genna 9 (1623). His son, the second generation (nidai), is commonly known by the sobriquet "Naka-Kawachi" and became the architect of the family's most recognizable artistic contribution.
The Kunisuke's early works faithfully inherit Kunitsugu's manner: a -based mixed with , , and pointed elements, with deep , thickly adhering , and a that "shows a (subdued) tendency." The forging displays mixed with and standing grain, producing "the characteristic texture of workmanship." Features such as a diagonal rising from below the , , , and a Jizo-like further confirm his origins. In his mature Osaka period, the developed a brilliant into which multiple edge-forms are interwoven. The nidai Kunisuke refined this inheritance into a singular artistic statement: "a tightly forged structure and a brilliantly decorative as the principal motif, into which he mixes his own distinctive, clenched-fist-shaped -- known in the world as ." This signature element, combined with a long straight at the base, -dominant tempering with , and a returning in , constitutes the nidai's "quintessential artistic territory."
The appraises the finest blades of both generations with language of the highest order. The 's works are valued both for their intrinsic quality and for their documentary significance in illuminating the -to-Osaka stylistic transition, while the nidai's masterworks are described as displaying "the very pinnacle" of his craft. Across both generations, the tightly forged with thickly applied and fine produces "the refined and bright steel characteristic of Osaka ." The nidai's , executed within a broad above the characteristic , achieves a "splendid and florid " with a bright, clear that epitomizes the decorative grandeur of the -era Osaka school.