Template:Certification Table Entry/Sales/JapanesePeriod/doc
 | This is a documentation subpage for Template:Certification Table Entry/Sales/JapanesePeriod. It contains usage information, categories and other content that is not part of the original template page. |
This helper template calculates periods for Japanese certifications, as stated in RIAJ#RIAJ Certification
It returns:
| Before June 2003 | From June 2003 |
|---|---|
| 1 | 2 |
Returns 0 if the data provided is not sufficient.