Based on technical records, javx.sub.com appears to be a subdomain associated with specific network configurations rather than a public-facing website with independent content. WhoisFreaks

Users should exercise extreme caution. Engaging with sites utilizing this nomenclature exposes devices to malware, personal data to trackers, and the user to potential legal liability regarding copyright infringement. Standard cybersecurity hygiene—such as using ad-blockers, script blockers, and avoiding entering personal information—is essential if one must interact with this sector of the internet.

If you want to understand the foundation of Japanese TV popularity, these classics are essential viewing: