Charles,
the photos do not show the NAKAGO (tang) which would be important for a guess (orientation always tip-upwards, dark or black background).
There is nothing on your sword that relates it to WWII. The blade could be older, but the condition does not allow to see HADA, HAMON or other important details. The TSUKA-ITO (handle wrap) is wrong and probably a later amateur 'repair'. SAYA, HABAKI, and the simple TSUBA look Japanese to me, but this is just a guess based on these photos.