: It may be an internal reference code, stock keeping unit (SKU), or project identifier for a specific company (e.g., a "JUQ" series in a manufacturer's catalog).

Visual Storytelling

The alphanumeric code used in Japanese AV production is not random; it signifies the studio and the series.

I would recommend checking the original source where you encountered the term — such as an invoice, receipt, forum, private message, or promotional email.

If seeking information regarding the history of Japanese media distribution or general filmography databases, those can be found through standard entertainment industry archives.