Page:The Civil code of Japan (IA cu31924069576704).pdf/239
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830.
The acknowledgment of a natural child who is of full age can be made only with his assent.
831.
A father may also acknowledge a child in the womb. In such case the assent of the mother is necessary.
The acknowledgment of a natural child by the father or mother can be made after the child’s death only if he has left descendants. If the latter are of age, their assent must be obtained.
832.
The effects of an acknowledgment relates back to the time of birth, without prejudice, however, to rights already acquired by third persons.
833.
A parent who has made an acknowledgment cannot revoke it.
834.
The child or any person interested is entitled to allege facts opposed to the acknowledgment.
835.
A child or any of his descendants or the legal representative of any such person can demand acknowledgment from the father or the mother.
836.
By the marriage of his father and mother a shoshi acquires the status of a legitimate child.