Divorce data 1992 - 2019
This is updated divorce data from the Ministry of Health, Labor, and Welfare (MHLW) of Japan. It comprises 28 years of data from 1992 to 2019. It is the most recent data available at this time. The annual data sets from MHLW were compiled into one table. International divorces in Japan are also shown including several nationalities as well as the gender of the non-Japanese spouse. The nationalities include Koreans, Chinese, Filipinos, Thais, Americans, British, Brazilians, and Peruvians.
As seen on https://www.kizuna-cpr.org/counting-the-children, the number of children is roughly equivalent to the number of divorces, which can be used to estimate the number of children.
A large screen (tablet or laptop) is needed to zoom in and see all the numbers clearly.