Japan's Imperial Household Agency said Friday that it has completed the full official records of Empress Kojun, the wife of former Emperor Hirohito, posthumously called Emperor Showa.

The agency plans to release the records on Oct. 9. In an unprecedented move for such imperial records, the agency will disclose the entirety of the contents on its website.

It took 17 years to complete the full records for the paternal grandmother of Emperor Naruhito.