Muneyori is transmitted as a smith of the Ko-Bizen school, listed in the meikan as "Bizen Genryaku-zen" — that is, active before the Genryaku era (1184–1185) — placing him at the boundary of the late Heian and early Kamakura periods. His precise lineage within the Ko-Bizen group remains a matter of scholarly uncertainty; the designation records note that his school affiliation "is not entirely clear." His workmanship and the manner of his signature (mei) are regarded as similar to those of Kageyori, suggesting a close working relationship or shared workshop tradition within the broader Ko-Bizen milieu. Extant works bearing his signature are extremely few, lending considerable rarity to any authenticated example.
Muneyori's tachi are rendered in shinogi-zukuri with iori-mune, exhibiting pronounced koshi-zori with fumibari and chu-kissaki — a classical Ko-Bizen silhouette. The forging is an itame-hada that stands out with a tendency toward hada-dachi, with ji-nie adhering and faint utsuri appearing in the ground. The hamon is characteristically a chu-suguha base into which ko-midare and ko-choji intermingle, tempered with ko-nie; ashi and yo enter, and sunagashi and kinsuji are observed within the temper line. The nioiguchi is noted as deep and clear. The boshi tends toward a straight form, either tightening in (sugu ni tsumeru) or turning in ko-maru with hakikake. The nakago bear bold, large two-character signatures executed in a confident hand.
The NBTHK characterizes Muneyori's work as possessing an antique charm — koko — that is the hallmark of early Bizen workmanship. At the same time, the records acknowledge a somewhat provincial quality that "lacks refinement," distinguishing his hand from the more polished output of later Bizen masters. This combination of archaic dignity and forthright rusticity places Muneyori among the earliest identifiable personalities of the Bizen tradition, a smith whose rare surviving blades preserve the austere character of Ko-Bizen craftsmanship before the school's celebrated refinement of subsequent generations.
