If you have paid taxes in Japan, please send a copy of one of the following:

Some points of attention

• Tax payment certificate to regional governments are not accepted
• Receipts at time of payments of tax are not accepted
• Other Tax payment certificates
• In case of provisional payment certificates with remaining unpaid taxes stated, application is not possible
• If you hand in provisional tax statements, it is possible that you will be asked to submit final tax statements at a later date.
• It is also possible to submit copies of E-tax statements.

Source:  Application guidelines. Version December 2015 (Zipfile, In Japanese) page 19-20