These are "freshness" markers. Uploaders use these terms to signal to search engine algorithms that the post is recent or has been recently verified.
While your snippet says "57 min," the full retail version typically runs closer to 120–160 minutes sone290subjavhdtoday030257 min updated
While the keyword appears to be a specific string of metadata—likely referring to a Japanese adult video (JAV) code, its subtitle status, resolution, and runtime—it represents a broader trend in how digital media is indexed and searched online. These are "freshness" markers
[Studio Code] - [Title] - [Actress] - [Resolution].ext its subtitle status