Sukeyoshi (助吉) belongs to the Fukuoka group, which flourished from the early period through the era in Province. The lineage produced many excellent smiths across several locales, including Fukuoka, Yoshioka, Katayama, and Iwato. According to sword signature compendia, Sukeyoshi was the son of Fukuoka Sukefusa, and one theory holds him to have been the founder of the Yoshioka line. Smiths bearing the name Sukeyoshi appear in both the Fukuoka and Yoshioka branches, and determining which works belong to which hand remains a matter of careful study. The distinguishes Fukuoka Sukeyoshi by the brilliant, large-pattern - that is the hallmark of mid- Fukuoka production.
The technical signature of Sukeyoshi's work is rooted in the richly varied tempering style. Designated examples display mixed with and , with abundant and , adhering well, and and appearing throughout. In some works, the temper takes a -based form inclining to , described as a characteristic of slightly later-period Fukuoka production. The forging typically shows dense mixed with , tightly worked, with , , and vivid standing out across the surface. Earlier works exhibit an archaic manner in both and , clearly identifying them as Ko- production following immediately upon , with a -based temper mixed with small and lively activity.
The consistently characterizes Fukuoka Sukeyoshi's work as displaying "an excellent level of workmanship," noting that the most splendid and richly varied style of large-pattern - reaches its peak in the Fukuoka group of the mid- period. Works attributed by confirm the continuity of this appraisal tradition. The combination of brilliant tempering, tightly forged steel with prominent , and sound preservation () places Sukeyoshi among the accomplished smiths of the mainstream.