In Japan, the crude birth rate in 1800 was 29.6 live births per thousand people, meaning that approximately three percent of the population had been born in that year. From 1800 to 1865, Japan's crude birth rate rose gradually to around 34 births per thousand people, before dropping relatively sharply to 25 over the next ten years. This was a time of great social and economic reform in Japan, as the country became increasingly urbanized and industrialized. Japan's crude birth rate reached it's highest recorded point in the early 1920s, where the number was almost 35 births per thousand people, and since then it has been decreasing gradually. There were two times in the twentieth century where Japan's crude birth rate increased, after the Second World War, and during the period of economic prosperity in the 1960s and 70s. Since 1975, Japan's crude birth rate has gradually decreased to it's lowest recorded rate ever, and is expected to be at just 7.5 births per thousand people in 2020, making it the second lowest in the world (behind Monaco).

In 2023, 727,288 live births were recorded in Japan, continuing the downward trend of the last decade. In the same year, the number of deaths of newborns amounted to 600.

The fertility rate of a country is the average number of children that women from that country will have throughout their reproductive years. From 1800 until 1865, Japan's fertility rate grew quite gradually, from 4.1 children per woman, to 4.8. From this point the fertility rate drops to 3.6 over the next ten years, as Japan became more industrialized. Towards the end of the nineteenth century, Japan's fertility rate grew again, and reached it's highest recorded point in the early 1920s, where it was 5.4 children per woman. Since this point it has been gradually decreasing until now, although it did experience slight increases after the Second World War, and in the early 1970s. In recent decades Japan's population has aged extensively, and today, Japan has the second oldest population and second highest life expectancy in the world (after Monaco). In contrast to this, Japan has a very low birth rate, and it's fertility rate is expected to fall below 1.4 children per woman in 2020.

Japan JP: Birth Rate: Crude: per 1000 People data was reported at 7.800 Ratio in 2016. This records a decrease from the previous number of 8.000 Ratio for 2015. Japan JP: Birth Rate: Crude: per 1000 People data is updated yearly, averaging 10.800 Ratio from Dec 1960 (Median) to 2016, with 57 observations. The data reached an all-time high of 19.400 Ratio in 1973 and a record low of 7.800 Ratio in 2016. Japan JP: Birth Rate: Crude: per 1000 People data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Japan – Table JP.World Bank.WDI: Population and Urbanization Statistics. Crude birth rate indicates the number of live births occurring during the year, per 1,000 population estimated at midyear. Subtracting the crude death rate from the crude birth rate provides the rate of natural increase, which is equal to the rate of population change in the absence of migration.; ; (1) United Nations Population Division. World Population Prospects: 2017 Revision. (2) Census reports and other statistical publications from national statistical offices, (3) Eurostat: Demographic Statistics, (4) United Nations Statistical Division. Population and Vital Statistics Reprot (various years), (5) U.S. Census Bureau: International Database, and (6) Secretariat of the Pacific Community: Statistics and Demography Programme.; Weighted average;

In 2022, there were around 6.3 live births per 1,000 inhabitants in Japan, down from about 6.6 in the previous year. The total number of live births in the nation amounted to approximately 770.8 thousand in 2022.

Japan’s aging society Directly after the end of WWII, the live birth rate in Japan was over 30 per 1,000 of population. The rate has constantly dropped in the last decades after the second baby boom (between 1971 and 1974). Meanwhile, the life expectancy of the Japanese people has continued to increase, reaching about 87.7 years for women and 81.7 years for men in 2020. Due to the combination of both factors, Japan has developed into the most rapidly aging society in the world. Almost 30 percent of Japan’s population is currently aged 65 years and older, falling into the “super-aged nation” defined by international institutions and organizations. 

Decreasing number of marriages In Japan, the number of births outside of marriage is small. The Japanese government, therefore, considers the decreasing number of marriages as the driving factor behind the country’s fertility decline. As of 2022, the number of marriages per 1,000 Japanese citizens was 4.1, less than half compared to that in the early 1970s. The average age of first marriage has also risen for both men and women in recent years. This trend can be partially attributed to the increasing number of employed and therefore financially and socially independent women in the last two decades. The employment rate of women in Japan exceeded 50 percent for the first time in history in 2018.

Japan IPSS: Population: Projection: Medium Mortality: High Birth Rate data was reported at 94,903.610 Person th in 2065. This records a decrease from the previous number of 95,688.439 Person th for 2064. Japan IPSS: Population: Projection: Medium Mortality: High Birth Rate data is updated yearly, averaging 113,738.979 Person th from Dec 2015 (Median) to 2065, with 51 observations. The data reached an all-time high of 127,094.745 Person th in 2015 and a record low of 94,903.610 Person th in 2065. Japan IPSS: Population: Projection: Medium Mortality: High Birth Rate data remains active status in CEIC and is reported by National Institute of Population and Social Security Research. The data is categorized under Global Database’s Japan – Table JP.G004: Population: Projection: National Institute of Population and Social Security Research.

Japan: Deaths of female children under five years of age per 1000 live births: The latest value from 2022 is 2 deaths per 1000 births, unchanged from 2 deaths per 1000 births in 2021. In comparison, the world average is 23 deaths per 1000 births, based on data from 187 countries. Historically, the average for Japan from 1960 to 2022 is 9 deaths per 1000 births. The minimum value, 2 deaths per 1000 births, was reached in 2018 while the maximum of 36 deaths per 1000 births was recorded in 1960.

In 2021, the total fertility rate (TFR) in Okinawa Prefecture amounted to 1.8, the highest among the 47 prefectures of Japan. By comparison, Tokyo prefecture recorded the lowest fertility rate of 1.08. That year, the overall total fertility rate in the country stood at 1.3.

Japan JP: Mortality Rate: Infant: Female: per 1000 Live Births data was reported at 1.800 Ratio in 2017. This records a decrease from the previous number of 2.000 Ratio for 2015. Japan JP: Mortality Rate: Infant: Female: per 1000 Live Births data is updated yearly, averaging 2.200 Ratio from Dec 1990 (Median) to 2017, with 5 observations. The data reached an all-time high of 4.200 Ratio in 1990 and a record low of 1.800 Ratio in 2017. Japan JP: Mortality Rate: Infant: Female: per 1000 Live Births data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Japan – Table JP.World Bank: Health Statistics. Infant mortality rate, female is the number of female infants dying before reaching one year of age, per 1,000 female live births in a given year.; ; Estimates developed by the UN Inter-agency Group for Child Mortality Estimation (UNICEF, WHO, World Bank, UN DESA Population Division) at www.childmortality.org.; Weighted average; Given that data on the incidence and prevalence of diseases are frequently unavailable, mortality rates are often used to identify vulnerable populations. Moreover, they are among the indicators most frequently used to compare socioeconomic development across countries. Under-five mortality rates are higher for boys than for girls in countries in which parental gender preferences are insignificant. Under-five mortality captures the effect of gender discrimination better than infant mortality does, as malnutrition and medical interventions have more significant impacts to this age group. Where female under-five mortality is higher, girls are likely to have less access to resources than boys.

Japan IPSS: Population: Projection: Low Mortality: High Birth Rate data was reported at 96,570.605 Person th in 2065. This records a decrease from the previous number of 97,346.029 Person th for 2064. Japan IPSS: Population: Projection: Low Mortality: High Birth Rate data is updated yearly, averaging 115,105.879 Person th from Dec 2015 (Median) to 2065, with 51 observations. The data reached an all-time high of 127,094.745 Person th in 2015 and a record low of 96,570.605 Person th in 2065. Japan IPSS: Population: Projection: Low Mortality: High Birth Rate data remains active status in CEIC and is reported by National Institute of Population and Social Security Research. The data is categorized under Global Database’s Japan – Table JP.G004: Population: Projection: National Institute of Population and Social Security Research.

With over 292 thousand births, women aged 30 to 34 years were the leading age group giving birth in Japan in 2021. Overall, the number of live births in Japan added up to approximately 811.6 thousand in the year.

This horizontal bar chart displays fertility rate (births per woman) by date using the aggregation average, weighted by population female and is filtered where the country is Japan. The data is about countries per year.

For most of the past two centuries, falling birth rates have been associated with societal progress. During the demographic transition, where pre-industrial societies modernize in terms of fertility and mortality, falling death rates, especially among infants and children, are the first major change. In response, as more children survive into adulthood, women have fewer children as the need to compensate for child mortality declines. This transition has happened at different times across the world and is an ongoing process, with early industrial countries being the first to transition, and Sub-Saharan African countries being the most recent to do so. Additionally, some Asian countries (particularly China through government policy) have gone through their demographic transitions at a much faster pace than those deemed more developed. Today, in countries such as Japan, Italy, and Germany, birth rates have fallen well below death rates; this is no longer considered a positive demographic trend, as it leads to natural population decline, and may create an over-aged population that could place a burden on healthcare systems.

Japan JP: Mortality Rate: Under-5: Female: per 1000 Live Births data was reported at 2.500 Ratio in 2016. This records a decrease from the previous number of 2.900 Ratio for 2015. Japan JP: Mortality Rate: Under-5: Female: per 1000 Live Births data is updated yearly, averaging 3.000 Ratio from Dec 1990 (Median) to 2016, with 5 observations. The data reached an all-time high of 5.700 Ratio in 1990 and a record low of 2.500 Ratio in 2016. Japan JP: Mortality Rate: Under-5: Female: per 1000 Live Births data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Japan – Table JP.World Bank: Health Statistics. Under-five mortality rate, female is the probability per 1,000 that a newborn female baby will die before reaching age five, if subject to female age-specific mortality rates of the specified year.; ; Estimates Developed by the UN Inter-agency Group for Child Mortality Estimation (UNICEF, WHO, World Bank, UN DESA Population Division) at www.childmortality.org.; Weighted Average; Given that data on the incidence and prevalence of diseases are frequently unavailable, mortality rates are often used to identify vulnerable populations. Moreover, they are among the indicators most frequently used to compare socioeconomic development across countries. Under-five mortality rates are higher for boys than for girls in countries in which parental gender preferences are insignificant. Under-five mortality captures the effect of gender discrimination better than infant mortality does, as malnutrition and medical interventions have more significant impacts to this age group. Where female under-five mortality is higher, girls are likely to have less access to resources than boys.

Chart and table of the Japan infant mortality rate from 1950 to 2025. United Nations projections are also included through the year 2100.

UNICEF's country profile for Japan, including under-five mortality rates, child health, education and sanitation data.

Vital Statistics: Japanese Only: Per 1000: Live Births Rate data was reported at 7.600 % in 2017. This records a decrease from the previous number of 7.800 % for 2016. Vital Statistics: Japanese Only: Per 1000: Live Births Rate data is updated yearly, averaging 12.800 % from Dec 1947 (Median) to 2017, with 71 observations. The data reached an all-time high of 34.300 % in 1947 and a record low of 7.600 % in 2017. Vital Statistics: Japanese Only: Per 1000: Live Births Rate data remains active status in CEIC and is reported by Ministry of Health, Labour and Welfare. The data is categorized under Global Database’s Japan – Table JP.G005: Vital Statistics.

The mean age of childbearing in Japan was estimated at around 31.4 years in 2021, slightly down from the previous year. Within the Asian region, Japan showed one of the highest mean age of childbearing.

Time trends for multiple pregnancies and perinatal health indicators.

Text A, Representation theorem for a right eigenvector of an irreducible non-negative matrix. Text B, Theorem for infinite series expansion of characteristic equation. Text C, Original definition of type-reproduction number. Text D, Extension theorem of type-reproduction number. (ZIP)