The Tokyo Family Court has rejected a suit filed by a married gender identity disorder plaintiff seeking to have the couple's son, born via donor insemination, listed as their legitimate child in the family registry.

The plaintiff, 30, who was born a woman, reportedly had a sex-change operation and has registered as a male. His wife gave birth to the son, who is now almost 3, through donated sperm while the couple were living in Shiso, Hyogo Prefecture. The pair are now residents of Higashiosaka in Osaka Prefecture.

The court ruling Wednesday was the nation's first involving the family register of a child whose parents include someone whose gender designation was legally changed to that of a man because of GID, the Justice Ministry said.