example, because the parents’ country of origin adopts strict jus solis while Japan, the country of birth, adopts jus sanguinis
Category B [State succession I]: Persons whose country of previous nationality has gone through State succession who cannot have their possession of the nationality of the successor State or the predecessor State confirmed
Category C [Consulate denial I (Refugees)]: Persons unable to have their birth registered or a passport issued, etc., due to rejection by relevant consular authorities (or inability to pursue such assistance) for refugee related reasons, such as having applied for asylum or having been recognized as a refugee
Category D [Consulate denial II (Persons similarly situated as refugees)]: Persons for whom the relevant consular authorities refuse assistance such as registration of birth or issuance of a passport for reasons related to their status being similar to refugees, such as those who have been granted permission to stay as “settled refugees” or on “humanitarian grounds” without recognition of refugee status under the 1951 Refugee Convention
Category E [Change of personal status]: Persons who had acquired Japanese nationality at birth by having a parent with Japanese nationality based on the Nationality Act which adopts jus sanguinis, but who, due to the subsequent change of their legal parentage, “lost” their nationality retroactively going back to the time of birth making them illegal stayers in Japan
Category F [Failure of naturalization and restoration of previous nationality]: Persons who renounced their previous nationality in the naturalization process, etc., at the request of relevant authorities in Japan which did not permit dual nationality, who nevertheless failed to acquire another nationality
Category G [Unknown or stateless parents]: Persons whose parents are unknown or are stateless and who therefore would normally fall within the scope of Nationality Act Article 2(iii), which provides for acquisition of Japanese nationality at birth, who nevertheless became stateless by an inability to prove the fact that their parents are unknown or stateless
Category H [Consulate denial III (Others)]: Persons understood to have acquired the nationality of the country concerned according to the text of the nationality law of that country, for whom nevertheless the relevant consular authorities refuse birth registration or the issuance of a passport for reasons such as being born out of wedlock 17