The Hikita Names around the Muromachi Shogunate in Tokitsugukyōki
A source-layered study of Hikita names in Tokitsugukyōki and Hikita Bungorō's self-description in Kaikokuki, separating contemporary evidence, modern research, family tradition, and hypothesis.
An independent research column tracing 愛洲之黒薬 in 1548, Tokitsugu’s compounding and distribution, and a formula sent again to Ōgo, while separating evidence from inference about Aisu Hisatada.