The koseki (戸籍) system is still used in Japan and China (where it is called the hukou). The koseki is a census record that records all of a person's demographic information, including birth, death, marriages, divorces, and criminal convictions.
During the Edo period, travel between the provinces in Japan was strictly regulated. Although these restrictions no longer exist, you have to update your koseki when you move. Local governments in China continue to use the hukou system to control internal migration.
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