J. League SakaTsuku 7 Euro+ - messy text

[AndyKusanagi]

Well, first of all, hello, everyone.
Here's the thing: I've been trying to play J. LEAGUE Pro Soccer Club o Tsukurou! 7 Euro Plus, but I've been having a problem: the text in Japanese is completely garbled, as if they were reading from different points of a tile map. The attached picture shows how it looks in-game.
Funny thing is, the Memory Stick text when I boot the game looks perfectly fine, as does the text entry character map. It's just these texts, and they're in pretty much 99% of the game. I'm not sure whether this is a compatibility issue or not, because the game runs smoothly aside from this, so I put it up here.
What could be the cause? Is there a solution?
Thanks in advance.

P.S.: I also tested SakaTsuku 8. The text appears the same way.