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tion of the adoption only in case he thereby acquires a foreign nationality.
20.
A person who voluntarily acquires a foreign nationality loses thereby his Japanese nationality.
21.
The wife or child of a person who loses his Japanese nationality, loses the Japanese nationality on acquiring the nationality of such person.
22.
The provisions of the preceding article do not apply to the wife or child of a person who loses his Japanese nationality by divorce or the dissolution of adoption, unless the wife in case of the dissolution of adoption of her husband does not precure a divorce, or the child quits the house following his father.
23.
If a child who is a Japanese subject acquires by acknowledgment a foreign nationality, he loses his Japanese nationality; but this does not apply to a person who has become the wife of a Japanese subject, the husband of a Japanese woman being the head of the house, or the adopted child of a Japanese subject.
24.
Notwithstanding the provisions of the preceding five articles, a male person of the age of seventeen years or