About misdisposal of alumni register in Municipal Elementary Schools

　In Yokohama Municipal Elementary Schools, it was found that the location of the graduate ledger before fiscal 2015 was unknown. The school continues to check the background and search for the actual thing, but as of July 30, 2020, no graduate ledger before 2015 has been found.
　At the time of document disposal at the end of 2016, it is considered that it was accidentally discarded.