It is a dead end.
In the data hoarding community, the "MHF-Z PS Vita English Patch v0.95 (Pre-v9.00)" still exists on archive.org and certain Russian forums. You can download the 247MB patch file. You can install it on a hacked Vita. And you can launch the Japanese game client... only for it to fail at the server login screen. monster hunter frontier z ps vita english patch patched
In the sprawling history of Monster Hunter , few titles inspire as much awe, confusion, and frustration as Monster Hunter Frontier Z (MHF-Z). For nearly twelve years, Frontier was a Japan-exclusive PC and console MMO that pushed the franchise to its absolute limit—flying wyverns, magnetic monsters, and lightning-fast combat that made G-Rank look like a tutorial. It is a dead end
