What is birth seasonality in Japan?

Birth seasonality in Japan was 16.05 births per million people in 2023, according to Human Mortality Database (2025) – processed by Our World in Data.

What is the highest birth seasonality recorded in Japan?

The highest recorded value was 80.81 births per million people in 1949.

What is the lowest birth seasonality recorded in Japan?

The lowest recorded value was 16.05 births per million people in 2023.

How does Japan rank for birth seasonality?

Japan ranks 38th out of 40 countries with data for 2023.

Is birth seasonality rising or falling in Japan?

Over the last ten years it is down 27.6%. The long-run trend across the full record is falling.

Where does this Japan data come from?

The figures come from Human Mortality Database (2025) – processed by Our World in Data, published as part of Birth seasonality. Statizoid updates them automatically from the source API.

Birth seasonality in Japan

Name: Birth seasonality in Japan
Creator: Human Mortality Database (2025) – processed by Our World in Data
License: CC BY 4.0 (Our World in Data)

Japan: Birth seasonality was 16.05 births per million people in 2023. ▼ Falling

Latest (2023)

16.05 births per million people

Change on year

down 2.5%

World rank

38th

of 40 countries

All-time high

80.81 births per million people

in 1949

All-time low

16.05 births per million people

in 2023

Years of data

125

1899–2023

Birth seasonality in Japan, 1899–2023

Source: Human Mortality Database (2025) – processed by Our World in Data. Measured in births per million people.

Analysis

The most recent figure for birth seasonality in Japan is 16.05 births per million people, measured in 2023. That is the lowest value across all 125 years on record.

That represents a change of down 2.5% on the previous year and down 27.6% over ten years.

Over the whole period, birth seasonality in Japan peaked at 80.81 births per million people in 1949 and was at its lowest, 16.05 births per million people, in 2023.

Japan ranks 38th of 40 countries on this measure, in the bottom quarter.

The long-run direction has been consistently falling across the 125 years of available data.

Averages by decade

Decade	Average	Lowest	Highest	Years
1890s	55.14 births per million people	55.14 births per million people	55.14 births per million people	1
1900s	53.7 births per million people	50.84 births per million people	59.32 births per million people	10
1910s	56.07 births per million people	50.83 births per million people	64.51 births per million people	10
1920s	58.31 births per million people	53.36 births per million people	65.64 births per million people	10
1930s	60.05 births per million people	53.34 births per million people	65.75 births per million people	10
1940s	67.97 births per million people	47.75 births per million people	80.81 births per million people	10
1950s	52.6 births per million people	44.34 births per million people	72.1 births per million people	10
1960s	47.26 births per million people	43.95 births per million people	51.58 births per million people	10
1970s	46.1 births per million people	38.26 births per million people	52.35 births per million people	10
1980s	32.17 births per million people	28.19 births per million people	35.31 births per million people	10
1990s	26.17 births per million people	25.3 births per million people	27.23 births per million people	10
2000s	23.86 births per million people	22.46 births per million people	25.49 births per million people	10
2010s	21.24 births per million people	18.91 births per million people	22.96 births per million people	10
2020s	16.86 births per million people	16.05 births per million people	17.5 births per million people	4

Countries ranked near Japan

35 Poland 17.19 births per million people compare
36 Lithuania 16.79 births per million people compare
37 Latvia 16.19 births per million people compare
39 Hong Kong 12.49 births per million people compare
40 South Korea 10.29 births per million people compare

See the full ranking of 40 places →

More population data for Japan

Population growth rate, by level of development -0.5% (2100)
Number of children under 5, by world region 2.83 million people (2100)
Population density 210.83 people per km² (2100)
World population growth -0.5% (2100)
Total fertility rate vs. wanted fertility rate 1.15 births per woman (2024)
Refugees by country of asylum 29,068 people (2024)
Fertility rate vs. unmet need for contraception 1.15 births per woman (2024)
Total fertility rate vs. contraceptive prevalence 1.15 births per woman (2024)
Natural population growth rate -0.6% (2023)
Fertility rate: births per woman 1.21 live births per woman (2023)

All data for Japan →

Frequently asked questions

What is birth seasonality in Japan?: Birth seasonality in Japan was 16.05 births per million people in 2023, according to Human Mortality Database (2025) – processed by Our World in Data.
What is the highest birth seasonality recorded in Japan?: The highest recorded value was 80.81 births per million people in 1949.
What is the lowest birth seasonality recorded in Japan?: The lowest recorded value was 16.05 births per million people in 2023.
How does Japan rank for birth seasonality?: Japan ranks 38th out of 40 countries with data for 2023.
Is birth seasonality rising or falling in Japan?: Over the last ten years it is down 27.6%. The long-run trend across the full record is falling.
Where does this Japan data come from?: The figures come from Human Mortality Database (2025) – processed by Our World in Data, published as part of Birth seasonality. Statizoid updates them automatically from the source API.

Download this data

CSV · JSON — 125 observations, free to reuse under CC BY 4.0 (Our World in Data).

About this data

Indicator: Birth seasonality
Unit: births per million people
Source: Human Mortality Database (2025) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 40 places, 3,607 data points, 1840–2024
Last refreshed: 07 August 2026

The average daily number of births, per million people, calculated for December.