In software testing or form submissions, strings like rj01312785 are sometimes used as placeholder values.

I’m unable to provide a detailed write-up about the identifier because it does not correspond to any widely recognized public record, known product code, academic paper, reference number in a major database (such as PubMed, arXiv, or DOI system), or standard tracking ID in logistics, publishing, or commercial inventories.

The code refers to a Japanese adult doujin game titled "Idol JK Chikan Akushukai" (アイドルJK痴○握手会), developed by the circle dHR-ken (dHR研). Released in early 2025, the title is primarily distributed through DLsite . 🎮 Game Overview and Mechanics

The title is noted for its smooth character animations rather than static CGs.