Information about some of the possible swordsmiths:

Masakage (正景), Meiō (明応, 1492-1501), Bingo – "Bishū-jū Masakage" (備州住正景), "Bingo no Kuni Mihara-jū Kai Masakage"

Masachika (正近), Bunmei (文明, 1469-1487), Bingo – "Bingo no Kuni Mihara-jū Masachika" (備後国三原住正近), Kai-Mihara school,returned from Kinashi (木梨) to Mihara, suguha, ko-midare, wazamono

Masahiro (正広), Eiroku (永禄, 1558-1570), Bingo – "Bishū Mihara-jū Kai Masahiro saku" (備州三原住貝正広作), "Mihara-jū Masahiro"
(三原住正広), Kai-Mihara group

Masaoki (正興), 1st gen., Bunmei (文明, 1469-1487), Bingo – "Kai Fujiwara Masaoki" (貝藤原正興), "Bishū Mihara-jūnin Kai Masaoki"(備州三原住人貝正),according to transmission the son of Masachika (正近), Kinashi-Mihara group (木梨三原), he lived in Bingo´s Sakata (坂田), suguha-hotsure, ko-gunome, wazamono