So after some cursory research, I found examples that bear a resemblance to the sword in my possession. It appears that the inscription, based on these other examples may be "Wakasa no Kami Ujifusa" but in an abbreviated form. The issue is, this is a very notable and old smith who worked in the Tensho era. Likely forgery then?
Attached are two examples of his signature from other blades, and the version on mine again for reference.