Takatsuna is a smith of the school in Province, active from the late period into the early period. Although swordsmith reference works () list three smiths of named Takatsuna -- assigned respectively to around the Genkyū, Kangen, and Kōchō eras -- and further indicate the existence of several additional makers of the name, the has distinguished this Takatsuna as a separate figure within the lineage on the basis of forging characteristics, file marks, and the archaic character of the signature. Works attributed to him also appear in the Imperial Collection under the broader Yamashiro tradition, reflecting the overlapping classificatory frameworks applied to smiths of this early period.
Takatsuna's work is defined by an forging mixed with that shows "a tendency toward " (standing grain), accompanied by thick , fine , and a prominent mottled . His is fundamentally -based, mixed with , , and ; and enter frequently, with thick that in places becomes especially strong, producing , , and a -like appearance. and are described as "applied vigorously." In both and , "the characteristic features of are strongly expressed." The presence of old file marks and the archaic manner of the signature characters further support the attribution.
The describes Takatsuna's surviving work as revealing "the high technical level" and "high technical ability" of the smith, presenting "an excellent workmanship" and "an excellent dekiba." His blades are praised for their (sound and well-preserved) construction and for a "refined, well-worked forging with finely interwoven ." Beyond their artistic merit, they are regarded as "extremely valuable as documentary material" -- pieces that "help compensate for gaps in the record," filling lacunae in the historical understanding of the school.