Are you fluent in Japanese? If not you’re going to have a bad time. And as someone else mentioned, the store is locked to Japan’s PS store which man’ means you may but be able to get non JP language games. It also means payment methods might get rejected depending on their regional support. Not to mention I’m not sure if the store will even load from a non JP IP address considering how much they’ve tried to lock down the rest of it.

So no, it’s not a good idea.