This chart provides a simplified overview of how Japanese nationality may be acquired, lost, retained, or reacquired under the Nationality Act of Japan. It covers key situations such as birth to a Japanese parent, birth abroad, acknowledgment by a Japanese parent, naturalization, voluntary acquisition of foreign nationality, and nationality selection for dual nationals.
The chart is intended as a general guide only. Because nationality matters may depend on individual circumstances, family register records, foreign nationality laws, and administrative practice, professional advice should be sought for specific cases.
This chart is based on the Nationality Act of Japan and official guidance from the Ministry of Justice of Japan.