You must have a Vita running HENkaku/Enso (3.60 or 3.65 are preferred). Vitashell: To move files into the system partitions.
At the kernel level, the PS Vita uses SceLibFont (often found in the os0:kd/ or os0:us/ directories). This module is responsible for loading font files into memory and rasterizing them for display on the 544p OLED screen. download font package psvita top
For users with a modded console (running HENkaku or h-encore), "top" font packages usually refer to custom system-wide replacements. You must have a Vita running HENkaku/Enso (3