Industry and commerce will not impose fines. Invoices are under the control of the tax bureau, and your tax situation will not be investigated. If the customer finds out and wants you to re-open, you can ask the customer to return the invoice and then re-open. If it is returned within the same month, it will be invalidated. If you return after a month, issue a red invoice to offset the original invoice (there is no need to apply to the tax bureau, because you are not issuing a special value-added tax invoice, and your situation will not happen with this invoice), and then reissue it.