Like any other entertainment medium, it isn't hard to point out certain qualities that suggest whether a game was developed in Japan or abroad. Japanese games tend to be very character driven, boast a more artistic visual style and are often a part of a long-standing series. ("Final Fantasy XII" rings a bell.)
"Prince of Persia: Warrior Within" (known as "Kenshi no Kororo" here in Japan) stands as an unabashed product of Western game design. (French-Canadian design, in this case.)
The sequel to the critically acclaimed "Prince of Persia: Sands of Time," "Warrior Within" has players once again following the adventures of an accursed prince.