in Kanbun 5 or 6 according to Tanobe-sensei.
This is right at the
time when Tsuta, 2nd Gen, was selected by
Inaba no Kami Aoyama, Head of
Osaka Castle, to make swords for him.
Signature is Kaku-mei. Kaku-mei
are rated O-Wazamono. Later works of Maru-mei
are rated only Ryo-wazamono.
Style is classic Toran-midareba which
he invented. Mukansa Polish.
Habaki by Tschernega's Father-in-Law who is