Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Koichi HASHIMOTO,Management Policies and Risk Perceptions of the “Education Industry” : Content Analysis of the Annual Securities Report,Journal of The Open University of Japan,0911-4505,放送大学,2024-03-25,41,,29-36,https://cir.nii.ac.jp/crid/1050581378933994880,