Japan’s National Diet Library (NDL) has made a significant decision regarding the preservation of video game media, stating that it will not include Nintendo’s Switch 2 Game-Key Cards in its collection. This choice highlights the evolving nature of digital content and the challenges libraries face in preserving modern media formats. The NDL, established in 1948, is responsible for archiving all new publications in Japan, including physical video games since 2000. However, the Game-Key Cards, which serve merely as keys for downloading games rather than containing the actual game data, do not meet the library’s criteria for preservation.