"Japan" . . "JAPAN." . . . "\"The sudden addition, within two years after Japan's surrender, of more than six million people to a population already overcrowded and facing a prolonged period of general postwar instability, has created a host of complex social and economic problems and a resultant need for reliable information upon which effective policies and programs might be formulated.\"--Preface." . . . . . . . . . "Annual changes in population of Japan proper, 1 October 1920-1 October 1947" . "Annual changes in population of Japan proper, 1 October 1920-1 October 1947"@en . . . . . . "POPULATION." . .