As the subsequent Heisei Era is set to wrap up next year, memories of the last war that Japan fought and lost — which left 3.1 million Japanese dead — may be fading fast for a large majority of the nation’s citizens. The number of bereaved families of the war dead taking part in the government-organized annual Aug. 15 ceremony to mourn for those who died in the war is declining each year. Today, the number of people born after the war has topped 100 million, accounting for more than 80 percent of the population.