Died as a prisoner of war.
From Find a grave:
Technical Sergeant Claude Emerson Carpenter died while a Prisoner of War (POW) in Moji, Kitakyūshū, Fukuoka, Kyushu Island, Japan. His body was cremated and his ashes were intermingled with other POW cremated remains. A sampling of those co-mingled remains were interred at the Yokohama Cremation Memorial and his name is enshrined on the wall with other known deceased POWs that died at Moji.