The revised Nationality Law cleared the Diet Friday but only after lawmakers at the last minute managed to have a clause inserted to prevent what they claimed would be a surge in bogus paternal recognition cases.
The revised law cleared the Upper House with the nonbinding clause, which calls for applicants to submit pictures of offspring and fathers taken together to prevent false paternal recognition.
Whether a DNA test should be applied to applicants was debated by lawmakers at length during the deliberations, including by Yasuo Tanaka, leader of New Party Nippon, who strongly advocated the need for such a test.
Other lawmakers said that since the Supreme Court ruled it unconstitutional to discriminate against children based on whether their parents are married or not, it would be further discrimination to include DNA tests to the revision.
Fukushima of the SDP said it is important to prevent false recognition, but warned that if the debate focuses too much on that issue, it might shy away from cases of true recognition.
The Justice Ministry opposes the DNA test, claiming it would send the wrong signal by promoting the concept of a family based purely on biological ties.
In the nationality acquisition process, the ministry official said the ministry will carry out thorough and varied checks to prevent false recognition. For instance, it plans to ask how the couples met, why they applied for nationality and whether the fathers plan to support the children.