The source calculated the proportion of cases by normalizing the number of total inhabitants of each gender age group to 100,000.
The calculations are based on the data of 9,852 people with COVID-19 infection reported on April 17, 2020 as well as the estimate of population in Japan as of October 1, 2019.
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Proportion of coronavirus cases per 100,000 inhabitants Japan 2020, by age and gender
As of April 17, 2020, the highest proportion of coronavirus disease (COVID-19) cases per Japanese inhabitants was reported for women aged 20 to 29, with approximately 13 cases per 100 thousand inhabitants of this age group and gender. The highest ratio for male patients was for the age group between 50 to 59 years, also 13 cases per 100 thousand inhabitants of this age group and gender.
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NHK. (April 24, 2020). Proportion of coronavirus disease (COVID-19) cases per 100,000 inhabitants in Japan as of April 17, 2020, by age group and gender [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1113460/japan-coronavirus-patients-proportion-per-100000-by-age-and-gender/
NHK. "Proportion of coronavirus disease (COVID-19) cases per 100,000 inhabitants in Japan as of April 17, 2020, by age group and gender." Chart. April 24, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1113460/japan-coronavirus-patients-proportion-per-100000-by-age-and-gender/
NHK. (2020). Proportion of coronavirus disease (COVID-19) cases per 100,000 inhabitants in Japan as of April 17, 2020, by age group and gender. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1113460/japan-coronavirus-patients-proportion-per-100000-by-age-and-gender/
NHK. "Proportion of Coronavirus Disease (Covid-19) Cases per 100,000 Inhabitants in Japan as of April 17, 2020, by Age Group and Gender." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 24 Apr 2020, /statistics/1113460/japan-coronavirus-patients-proportion-per-100000-by-age-and-gender/
NHK, Proportion of coronavirus disease (COVID-19) cases per 100,000 inhabitants in Japan as of April 17, 2020, by age group and gender ÌÇÐÄÆƽâ°æ, /statistics/1113460/japan-coronavirus-patients-proportion-per-100000-by-age-and-gender/ (last visited July 31, 2026)
Proportion of coronavirus disease (COVID-19) cases per 100,000 inhabitants in Japan as of April 17, 2020, by age group and gender [Graph], NHK, April 24, 2020. [Online]. Available: /statistics/1113460/japan-coronavirus-patients-proportion-per-100000-by-age-and-gender/
