This template accepts several unnamed parameters. The first should be set to either "Anime" or "Manga", depending on what the category in question covers. The second one is the first three digits in the year (for instance, if the category covers 1997, the second parameter's value would be "199"). The third parameter should only be used on individual year categories, and consists of the last digit in the year.
In addition, there are three named parameters:
individual hides the years row if set to "no"
nolead hides the lead sentence ("Anime/manga series released from...") if set to yes
nocat prevents this template from adding categories to pages it is transcluded onto