Morihiro was a swordsmith of the Chiyotsuru lineage of Province, a school traditionally held to descend from Chiyotsuru Kuniyasu, who was a disciple of Kuniyasu of Yamashiro. The swordsmith directories place the first generation Morihiro around the Oei era (1394--1428) and the second generation around the Kakitsu (1441--1444) and Bun'an (1444--1449) eras, though among extant works there are examples thought to predate the Oei period. He worked within the Yamashiro- tradition as inherited through the school, and his ranking of jo- in the Fujishiro classification reflects his recognized standing among the smiths of the late to early period.
Morihiro's characteristic workmanship features a -toned , at times mixed with small elements and angular . The forging is typically a tightly worked , in some pieces tending toward near the edge. Abundant is visible in both the and , with and entering the temper line and the described as bright and clear. Scattered and areas of appear in certain works, lending additional complexity. This differs in character from the style proper, and his finest productions are of such quality that they can be mistaken for the work of superior smiths -- one blade is noted as evoking the impression of an old "two-character Kunitoshi."
Morihiro's significance lies in both the high caliber of his craftsmanship and the rarity of his signed works, which the designation records repeatedly describe as precious reference material. As a link between the tradition of Yamashiro and the independent forging culture of , his blades document how metropolitan techniques were transmitted to and transformed in the provinces. The quality of his and demonstrates that the Chiyotsuru lineage produced work well beyond the level expected of a provincial school.