Kuniyuki is regarded as the founder of the group of Yamato Province and was active during the late period. Among works of the group, extant signed examples are few; only a small number survive with signatures by Kuniyuki and Aritoshi, while almost all others are works attributed as appraisals. His two-character signature appears in two modes: one rendered in (formal block script) within the enclosure, and another in gyosho (semi-cursive) form. Both varieties are considered extremely rare, and any by this smith commands particular scholarly attention.
Kuniyuki's forging is a well-worked mixed with , often showing areas of flowing grain and thick with appearing throughout. His is typically -based, gently and mixed with or small , tending at times toward . The characteristically shows , while within the tempered area runs frequently, interspersed with . The is bright and clear. His tends toward , turning or ending in — a disposition considered typical of Yamato workmanship. Activities such as and intermix freely, giving a lively effect to the steel.
Kuniyuki occupies a position of particular importance as the progenitor of the lineage within the broader Yamato tradition. His work demonstrates the defining characteristics of forging — the prominent tendency, the bright and clear and described as akaruku , and the restrained yet animated temper line — while displaying a refinement and individuality that distinguishes his hand from later smiths. The rarity of signed examples only heightens the significance of each surviving blade, and his best works are noted for their condition and sound preservation.