Sa Sadayuki
左定行 (Sa Sadayuki)
A smith of the Sa school of Chikuzen, of the Nanbokuchō period, who by tradition moved to Aki and founded the Geishū-Sa branch there.
Profile
Sa Sadayuki (左定行) is, by tradition, a pupil of Samonji, of the Sa school of Chikuzen, who moved to Aki province, today's Hiroshima, and founded the Geishū-Sa (芸州左) branch there. He is placed around the Shōhei era (1346-1370), a single source counts him among the yoki-wazamono (良業物), and one genealogy of the school makes him the father of Sa Kunihiro. No blade identified under his name is known.