The webpage is an ABMC-sponsored search page for WWII Casualties. It lists only those who are interred in ABMC Cemeteries overseas and the National Memorial Cemetery of the Pacific (The Punchbowl) in Hawaii and those MIA's whose names are inscribed on memorials at the above cemeteries. If he's not listed, that usually means his remains were returned to the U. S. after the war. His deceased file will reveal his place of interment. Ideally you want to provide as much info as possible but all that's required in this case is his full name and date of death and you have that.