Within the Yamato province, the Ryūmon school took its name from Ryūmon-shō in Yoshino District, where its smiths resided, and the trace its descent from the Senjuin line of the . The blades gathered here are dated to the late through periods, the 14th century, and carry attributions to the group rather than to a single hand, all being through . The school is represented above all by Enkichi, with the catalog records also naming Enyoshi, whose -based work mixed with is noted to bear affinity to a Ryūmon piece transmitted in the Chichibu-no-miya house. The describe two strains within the group: one in which a florid -ba is tempered with prominent , lending a -like character, and a second, more traditionally Yamato manner in which stays inconspicuous; the present works belong chiefly to the latter.
Across these the is mixed with and , the grain often standing in a or manner that signals the Yamato base; extremely fine forms thickly, and enter frequently, in places as large-pattern lines. The is a tempered with or , at times carrying a shallow tendency, with entering. Recognition of the hand rests along the , where the consistently record , , , and , with fine and running through and a bright . A faint -like near the edge appears on several blades. The tends to or , turning with or and .
For , the diagnostic cluster is the -tending with thick fine and frequent , set against a edge broken by and , a combination the appraisers read as the Ryūmon mark in both and . The luminous along the and the bright are repeatedly singled out, and the -bearing examples carry the -leaning temperament noted for one of the two strains. Provenance ties one example to the Chichibu-no-miya house through its resemblance to a recorded Enyoshi. Holding to its Senjuin and Yamato roots while admitting a -tinged register, the Ryūmon school occupies a defined place among the lineages of Yoshino.