Many websites claim to host the "v4 download" but are actually malware traps or outdated beta versions. As of this month, the most stable and safe source is the Jujutsu Kaisen Mugen Official Archive (hosted on MediaFire and MugenArchive).
If you can share exactly where you saw “Mugen v4” (YouTube video, website, Discord), I can help verify whether it’s legitimate or fake. Would you like that? jujutsu kaisen mugen v4 new download android pc
: Includes core characters like Yuji Itadori, Megumi Fushiguro, and Nobara Kugisaki, along with high-tier sorcerers like Satoru Gojo. Many websites claim to host the "v4 download"