Tomoyuki was a swordsmith of the group in Yamato Province, active during the period. The school, taking Kuniyuki as its founder, was a lineage affiliated with -dera that flourished from the mid- period through the era. One tradition holds that Tomoyuki was Kuniyuki's grandson; among his works there exists an example bearing a Bunwa-era date inscription. Signed works by the group are exceptionally rare, a scarcity attributed to their dependent relationship with the temple, and the great majority of surviving pieces are unsigned blades transmitted through attribution.
Tomoyuki's forging characteristically shows with a flowing tendency toward and mixed , a hallmark of the Yamato tradition; adheres well, with entering, and conspicuous appears in the better examples. The is fundamentally with shallow , mixed with , , and ; within the temper, , , and occur at the edge, and and flash repeatedly. The consistently shows , often in a or -like manner. The observe that, in comparison with Kuniyuki, Tomoyuki's works tend to display fewer conspicuous individual characteristics; yet the best examples present thick with a bright, clear brilliance and vigorous internal activities of and that place them among the finest achievements of the school.
The attribution to Tomoyuki is typically supported by the combination of wide and an extended or elongated together with Yamato-tradition forging characteristics. Most surviving pieces are greatly shortened in , though a displaying the school's characteristic pairing of with also attests to the range of his work.