Hey, if I remember correctly, Kyushu University posted some previous entrance exams for master's courses online on the Japanese website. For Doctoral courses, I have no idea. I would agree with A7mouse and say it is rather a way of testing your Japanese skills. It should be some kind of essay like questions. On the subject, I think the best person to ask would be the professor you're going to study with. He or she will most likely be composing the exam as well as correcting it.