45 Chiharu %28%28install%29%29 | Kansai Enkou

Several factors keep this term alive despite its illegality:

Files with this naming convention are typically found on adult content platforms, peer-to-peer (P2P) networks, or niche forums dedicated to "amateur" Japanese media. The "((INSTALL))" tag specifically points toward a software-packaged version of the media, which carries high risks of containing malware or unwanted bundled applications. Kansai Enkou 45 Chiharu %28%28INSTALL%29%29