Thanks Moriyama san,
Yes, that's my sword, a friend of mine years ago sent photos to an acquaintance of his in Japan to help solve the mystery. We believed that the dedication on the nakago was made by the same hand as the swordsmith's signature (not a later addition). And, that since it was "dedicated to the Kasuga temple by Mikawaya Jinkichi" my assumption has always been that it was GIVEN to the temple to reside there. Your post about the sword's possible owner has caused me to re-evaluate my thinking about its history. What is your opinion about it being given to the temple vs. just prayed over at the shrine?
Additionally, maybe you or other members could comment on how common it was to put a name and address on a shirasaya? I'm beginning to wonder if Mr. Terashima put his name on the shirasaya (like Japanese officers did on their military swords) in false assumption/ hope? that the sword would be returned to him.
Thanks again for all your help, Tom