Many thanks for all who have replied. The information on General Arisue is more than I could hope for.
The very best thing would be to return it to his family. Can anyone suggest what I can do next.
I am from Cleveland, Ohio and unfortunately can not speak or understand Japanese.
Many years ago I had aquired a dagger that had belonged to a WW2 German Naval Officer whose name was on the scabbard and had tried to return it to him as it was reported that he was still living at the time. Unfortunately, he passed on before I could make contact and his family never responded to the correspondence that I had sent.
Any help here would be deeply appreciated....