Rivkin,
Thank you very much for your comments.
I want to be certain that I understand your comment "The work has distinctive,...." With this comment are you describing characteristics of my sword, or characteristics to be expected on a sword by the Rai Kuniyuki?
Also, I have been unsuccessful in attempts to see images of the mei of the Rai Kuniyuki. Can you send a Link or suggest a source?
Additionally, I failed to mention that the Nagasa of my sword is currently 18.5". Since the original Mekugki hole was 3 1/16" from the newer hole, the original Nagasa would have been 21 9/16". I suppose that means this was either a long(ish) Wakizashi or a short (one-handed) Tachi. The blade is 21mm wide at its Yokote and 30mm wide at its Munemachi. I add this information since it might perhaps aid a knowledgeable person in determining whether the sword is Edo or pre-Edo.
Finally, the only reference book I have for Japanese swords is "The Samurai Sword" by John M. Yumoto, which I purchased in the early 1980s. I could probably benefit by purchasing a more exhaustive reference book. Do you recommend a good reference book for an old man wanting to learn new things?
Thanks again,
James A