氷心子秀世
Hyoshinshi Hideyo
Late Edo period. This smith is the son-in-law of a very big name in the sword world. He never became as skilled/talented as his father-in-law, but the name would attract some interest from collectors. Don't attempt any restoration or polishing yourself, as this kind of blade should only be polished by a well-trained polisher of Japanese swords. The scabbard and surrounding implements are age-appropriate, and its very nice to have a period ensemble like this.