Homogenous Japan? An Empirical Examination on Public Perceptions of Citizenship[‘Measuring Dimensions of National Identity across Countries: Theoretical and Methodological Reflections’]

Does the Japanese public consider shared ancestry the most essential condition for inclusion of an individual as a member of their country’s citizenry? This paper empirically assesses how the public in the ethnic nation views citizenship acquisition criteria. The originally conducted survey based on a conjoint format in Japan (2015) displays interesting results. Overall, Japanese people most heavily rely on the nationalities of parents in judging who qualifies as ‘Japanese’, confirming the contentions of previous works that highlight Japanese people’s belief in a mono-ethnic Japan. More detailed statistical analyses further reveal that Japanese people consider ethnic heritage through the father as the most essential criterion while the mother’s nationality and country of upbringing are also relevant. These results seem to reflect Japan’s long-lasting beliefs in cultural homogeneity as well as patriarchal values, which are reinforced by a patrilineal tradition of citizenship. This research advances the discussion on how to classify citizenship features by disaggregating ethnic lineage into paternal and maternal lines. Furthermore, it suggests a reevaluation of Japan’s institutional and social attachment to patrilineal ethnic heritage in order to ease multiple layers of discrimination posed against (particularly female) migrants and to realize a sound multiethnic society.