Sweden V. Yamaguchi

Sweden v. Yamaguchi, otherwise known as in the matter of Marianne Wilson, or in the matter of Mary Ann Vaughn, is a highly complex decision in international family law which touches on questions in law still unresolved over fifty years later. The formal name of the action was Israel Karl-Gustav Eugene Lagerfelt v. Yamaguchi Masakatsu and Yamaguchi Hideko, or Case of Demand for Delivery of an Infant, No. Wa-154, 1956 Yokohama District Court (Yokohama Chiho-saiban-sho), initiated February 22, 1956. On December 5, 1956, it held that the defendants should deliver the infant to the plaintiff. The appeal was dismissed by Tokyo High Court (No. Ne-2824) on July 9, 1958.