O Hada in many places, JIfu Utsuri mixed in Midare , all this points to Ko-Aoe of the relativ early Kamakura. Real Dan Utsuri would point to al later date as well as an true Chrimen would do. The hamon looks like Kamakura Yamashrio style. Later Aoe are more influenced by Bizen, Even the pretty large sumi points to an erlier blade.
The shape of the blade seems to be a little bit later, but we knew all that smith like Masatsune made this shape in the early Kamakura.
Ichimonji with Kyo-Ashi and Sujikai yasurime ?
Therefore I would think Ko-Aoe, early Kamakura.
Only my two cents.