Jean,
I promise you I am not lazy (60 + years since I was referred to as a boy :D :D ). I was up until 1130pm last night and back to it again at 0500 this morning on the sites you gave me. I make no progress or sense of any of it.
I am rather hoping that someone will give me a Morita San style translation to this.
BTW, showa era was 1926 to 1989, how do you tell when this sword was made?
edit: just noticed your post Joe, almost (not quite) what I have here, thanks.
Baz