Privacy laws, and 80-year retentions restrict access to ''koseki''.<ref>Dr. Kin-itsu Hirata and Dr. Greg Gubler, "Family and Local History in Japan. Breaking the Impasse: Sources and Options in Japanese Family History Research," ''World Conference on Records: Preserving Our Heritage, August 12-15, 1980,'' Vol. 11: Asian and African Family and Local History. {{FSC|33546|item|disp=FS Library US/CAN Book 929.1 W893 1980 v. 11}}</ref> | Privacy laws, and 80-year retentions restrict access to ''koseki''.<ref>Dr. Kin-itsu Hirata and Dr. Greg Gubler, "Family and Local History in Japan. Breaking the Impasse: Sources and Options in Japanese Family History Research," ''World Conference on Records: Preserving Our Heritage, August 12-15, 1980,'' Vol. 11: Asian and African Family and Local History. {{FSC|33546|item|disp=FS Library US/CAN Book 929.1 W893 1980 v. 11}}</ref> |