You can search the ID "RJ140155" directly on DLsite.com to find the original product page, which will list the creator, cast, and description of the audio work.

A reliable tool for macOS that handles almost any archive type.

It supports AES-256 encryption, which is often used by creators to protect paid digital content.

The 7z format is popular for digital media (like high-quality audio files) because it offers several advantages over standard .zip files:

When downloading files with an "RJ" prefix from third-party sources:

The file is a compressed archive containing a specific digital product, likely an ASMR or audio work , from the Japanese digital marketplace DLsite . The "RJ" prefix is the standard product ID format for that platform.

The .7z extension indicates the archive format. Standard Windows or Mac tools sometimes struggle with this format, so you will need a third-party extractor:

Because you are dealing with a file, you need specialized software to access its contents. Below is a guide on how to handle this specific file type and the technology behind it. 1. How to Open a .7z File