From The New York Times:
TOKYO — Japan on Friday promised to begin an investigation into the mysterious mutilation of hundreds of copies of “Anne Frank: The Diary of a Young Girl” and other books related to her at public libraries across Tokyo.
Local news media reports said 31 municipal libraries had found 265 copies of the diary by Frank, the young Holocaust victim, and other books vandalized, usually with several pages torn or ripped out. The reports said some libraries had taken copies of the diary off their shelves to protect them.
Officials said they did not know the motive for the vandalism, the first cases of which were discovered earlier this month.