Natality and Mortality Reconstructed from the List of Personnel Expired from the Family-Register (Koseki) and the List of Residents-Register

Abstract

The date of birth and the date and place of death were transcribed for each individual deceased registrant from the list of personnels expired from the family register (Koseki) on Kuchinoshima in the Tokara Islands in 1971. From this and the residential population in 1955 and thenceafter, the number of birth and death in each defined time-period was reconstructed. Accumulating the number of birth and excluding the number of death, the size of population was sequentially estimated since 1925 to 1970. In this artificial population, sequential natality and mortality rates were calculated and evaluated by comparing with the previously reported values based on the other sources.