A notification of the loss of Japanese nationality must be submitted by the party to the event under notification, or their spouse or relative within the fourth degree of kinship, within one month from the day on which they came to know of loss of Japanese nationality (or if the person who is required to submit the notification was abroad on the day on which they came to know of the fact, within three months from that day).
国籍喪失の届出は、届出事件の本人、配偶者又は四親等内の親族が、国籍喪失の事実を知つた日から一箇月以内（届出をすべき者がその事実を知つた日に国外に在るときは、その日から三箇月以内）に、これをしなければならない。
The written notification must state the following particulars, and be accompanied by a document certifying the loss of Japanese nationality:
届書には、次の事項を記載し、国籍喪失を証すべき書面を添付しなければならない。
the cause and date of the loss of Japanese nationality; and
国籍喪失の原因及び年月日
if the person has newly acquired nationality in a foreign country, the nationality in question.
新たに外国の国籍を取得したときは、その国籍