The Japanese version is on Vita; just not localized.
Would it be easy for someone to convert the translated text from the PS4 or Switch version of Robotics;Notes Elite and put it in the directory for the Vita game?
The same could be asked about the PS3 version.
Would it be easy for someone to convert the translated text from the PS4 or Switch version of Robotics;Notes Elite and put it in the directory for the Vita game?
The same could be asked about the PS3 version.