Thanks for obtaining the translation. The majority of this signature is what are now considered obsolete kanji. Prior to the war, the Japanese language included over 120,000 kanji. The educational system instituted by MacArthur cut that down by 3/4. The entire monting is quite well made and appears to be contemporary to the blade. The tsuba is the famous sea cucumber motif originated in tsuba made by the famous samurai Miyamoto Musashi. Our thanks to Guy as this was a case of not having the answer. It is quite unusual to see a wakizahi mounted in old style mounts all being from the war era.