Hi Kevin,
You have an Order of the Rising Sun, 7th Class. I can't read the text of the certificate all that well, but I can make out the Showa 15 year, this is 1940, so I think you can call this WWII era! This was both a civilian and a military order. I can't read closely enough to read the name of the recipient, but it should indicate a military rank if they had one. Can you post a closer-up pic.??? Are the case lid kanji silver or gold? A pic. of this might be helpful too as the color and style can put a time frame on the medal. Is the back of the medal enameled? I'm no expert on these, but from observation, they are typically all correct, but you do see the occasional award in the wrong era case or with a certificate that is out of period for the award. Yours is probably correct, a more seasoned collector might be able to give you more info just with the pics. you've posted though.