Many of these physical DVDs were produced in small batches. Once they go out of print, they become digital "lost media."

In the world of Japanese media, the "Idol" industry is a massive, multi-faceted machine. While many fans are familiar with mega-groups like AKB48, there is a thriving sub-industry of "Gravure" and "Image Idols." These models focus on high-quality photography and video releases (Image DVDs) that emphasize "kawaii" (cute) aesthetics and youthful charm.

Collectors look for specific codes to ensure they are getting the original, unedited high-bitrate versions of the film rather than low-quality re-uploads.