acquire nationality when his/her paternity is acknowledged after birth and his parents
subsequently become married. However, the child whose paternity is acknowledged
after birth cannot by his own will bring about marriage between his biological parents.
The Supreme Court ruled in 2008 that Article 3 of the Nationality Act 3 was
unconstitutional for lack of reasonable relevance in making marriage as a condition for
the child to acquire nationality. In considering the changes in social and economic
circumstances in Japan, the Supreme Court noted that:95
Japanese nationality is the qualification for being a member of the State of Japan,
and it is an important legal status that means a lot to people in order to enjoy [the]
guarantee of fundamental human rights, obtain public positions or receive public
benefits in Japan…Whether or not a child can acquire the status of a child born in
wedlock as a result of the marriage of the parents is a matter that depends on an
act relating to the personal status of the parents, which cannot be affected by the
child’s own intention or efforts… Differentiating treatment between children
acknowledged before and after birth in acquiring nationality cannot be justified by
the legislative purpose of measuring the closeness of the tie between the children
and Japan and amounts to discrimination even if the discretionary power vested in
the legislative body is taken in account.
As a consequence of this ruling, the Nationality Act was revised on December 12, 2008
(effective as of January 1, 2009). The amended provision stipulates that the child born
out of wedlock can acquire Japanese nationality if his father acknowledges paternity
after birth even if the parents are not legally married. Interim regulations allow those
born after January 2, 1983 and acknowledged before age 20 to obtain Japanese
nationality by notifying the Minister of Justice by December 31, 2011. These measures
helped eliminate the discrepancy between children acknowledged after and during
pregnancy. However, when paternal acknowledgment comes after birth, the child
acquires Japanese nationality by notification, so s/he might lose the nationality s/he
acquired at birth (granted by the laws of her/his mother’s state) from the perspective of
dual nationality prevention. However, this does not occur when paternal
acknowledgement comes during pregnancy, as s/he acquires Japanese nationality at
birth. This disparity remains.
95
Judgment of the Supreme Court (Grand Bench June 4, 2008)
http://www/courts.go.jp/english/judgements/text/2008.06.04.
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