If able to pass the desired graduate school entrance examination before arriving to Japan, then yes, it is possible to be admitted as a degree Student from the beginning.
However, in most of the cases the result of your MEXT scholarship application will yet be unknown at the time when you take the desired graduate school entrance examination, and you will have to pay the tuition just like the other self-supported students and get refund after entering our university and officially be selected as a MEXT student.
If you were, unfortunately, not selected as a MEXT student, we will not be able to refund the full tuition that you have paid. Furthermore, even if you were selected as a MEXT recipient but were not placed into our university, we will not be able to refund your tuition, either.
For these risks we do not recommend in taking any graduate school entrance examinations before being granted the entitlement as a MEXT student and officially placed to Waseda University. However, if you are coming to Japan from fall semester, there may be time to take the entrance examination for the regular course, as there is plenty of time between the decision as to placement at our university and arrival to Japan. If you have any questions, please do not hesitate to contact the Center for International Education (CIE) Office.