The school of Province traces its origin to Taro Kunimura, who is traditionally regarded as the son of Hiromura of the Yamato Senjuin school and the maternal grandson of Kuniyuki of Yamashiro. Some sources alternatively identify Kunimura as a student of Kunitoshi. Having relocated to the Kumafu area of Kikuchi District in , the lineage he established flourished greatly from the late period through the period, producing many highly accomplished smiths — Kuniyoshi, Kunitoki, Kuniyasu, Kunitomo, Kunisuke, Kuninobu, Kunitsuna, and others. The school is famed as having served as retained smiths of the Kikuchi family, loyalists of the Southern Court. Through its ancestral connection to both the and Senjuin traditions, the school represents a distinctive provincial expression of the Yamashiro aesthetic transplanted to Kyushu, and its members maintained this heritage across multiple generations while developing a collective identity recognizably their own.
The workmanship of the group broadly resembles that of the Yamashiro school, yet the consistently identifies several distinguishing hallmarks. In the forging, a conspicuous tendency toward appears within an base mixed with and , and the carries a whitish cast with standing out prominently. The is characteristically a in which the shows a somewhat tendency — a subdued, settled quality — with comparatively gentle activities within the tempered area. The tends toward a slightly larger roundness at the tip and is tempered with a characteristically shallow . A distinctive calligraphic trait shared across the school is the manner of cutting the right-hand interior portion of the character (国) into an ear-shaped form — a feature that cannot readily be confused with other schools. Within this shared framework, however, individual voices emerge with clarity. Kuniyasu is recognized as the smith whose work shows the strongest tendency toward dense , with thickly adhering , , , and effects that produce a -like aspect and impart "an individual and somewhat unconventional character" within the otherwise homogeneous school. Kunitoki's individuality lies in the particularly thick adherence of and a that achieves notable brightness, with certain works displaying an animated -based temper mixed with and that is rare within the group. Kunisuke's signature, by contrast, is cut with the boldest, thickest chisel strokes among the school's smiths, and his finest pieces occasionally depart from the restrained manner to adopt a deeply hardened, flame-like "without parallel even within the school."
The school holds a position of signal importance as one of the most prolific provincial sword-making traditions of the late and periods. Its founder Kunimura established the school's fundamental character — a refined of profound, subdued elegance inherited from the tradition — and his particular , with its conspicuous taper, pronounced , marked , and , provides sufficient basis for specific attribution even among unsigned blades. The has noted that among the finest works of Kuniyoshi and Kunitoki there are pieces that surpass Kunimura himself, affirming the school's capacity to produce successive generations of masters rather than merely imitating a founder. Kuniyoshi's oeuvre serves as an exemplar through which the characteristics of the lineage as a whole may be clearly observed, while Kuninobu's rare surviving works exhibit a refined quality of execution that surpasses the typical standard, with a silhouette that evokes the manner of Kunimitsu. The recurring observation across all the school's members — that their best works recall the workmanship of the main line — constitutes the most consistent testimony to the enduring connection between the tradition and its Yamashiro homeland. Works of particular note have been transmitted in the Mito Tokugawa and Kishu Tokugawa households, and the condition described as — sound and well-preserved — recurs throughout the school's designation records as a hallmark of its disciplined craftsmanship.