My JP post debit card can be used to pay for things, but I can’t withdraw from ATMs.

I've just discovered my card no longer allows for withdrawals of cash. It seems to work for payments though and I have my bankbook.

An older reddit post recommends remagnetising it. Trouble is Oshogatsu just started. Is there anything I can do without the post offices being open?

Hopefully I can still use my bankbook to withdraw cash from the big JP post ATM's.