Not necessarily Japan. It might be about Ludwig XIV. le "Roi-Soleil"... (sun)
Say hello to "The Three Musketeers" by Paradox. ..Well at least the third book is around the times of Ludwig XIV (swords)
Not Sweden: Yes, it's France!
Secong guess : a vampire-game. Swords, shining sun...![]()
Maybe it's both, "Blobvania" sounds a bit more promising than "Project Glory", though, so you should probably switch the name to this.