 A Japanese national does not lose their nationality in situations where citizenship is acquired involuntarily such as when a Japanese national marries an Iranian national.In this case they automatically acquire Iranian citizenship and is permitted to be an Iranian-Japanese dual national, since the acquisition of the Iranian citizenship was involuntary.Though it is unknown whether it has ever happened, citizenship can also be lost if a person becomes a civil servant of a foreign government, should their role be felt to contradict what it means to be a citizen of Japan.