The tag is the most important part of this filename. Monster Hunter Rise has two distinct regional versions that are treated as separate games by the Switch hardware:
Social animations and stances for photo mode.
This guide focuses on the technical aspects and content of the "MONSTER HUNTER RISE [205DLC][JP] NSP.rar" file, which is an archive containing 205 pieces of downloadable content (DLC) specifically for the Japanese version of Monster Hunter Rise on Nintendo Switch. 1. Understanding the File Contents
