Hello, new to this informative site. Have Wakizashi with Sayagaki on shirasaya

Seeking information about this nice little sword...total length of blade is 18&5/8", and blade from notch is 13&5/8". Tang not signed, but their is Sayaagaki information on the shirasaya. I do not know how to read it.I think it may have the Smiths' name and date. Any information would be appreciated. It has a lot of defects but nothing fatal....just like this sword!. Please see images attached

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