Hi there. Actually i have the same problem with you. I am looking for those who have received this fellowship before or the person who knows about this fellowship very well. And, I would like to share some info here. As I hv emailed the embassy, the officer replied that AYF will assign a priority to english speakers, instead of those who have JLPT qualification. 1 quota for master and 1 quota for phd (highly competitive!!!, phewww~), subject to change. I intend to apply so but I just don't know how to start the research proposal without the guidance of prospective supervisor. I asked about that too, the officer just did not reply me at all, maybe he/she doesnt know it too. It is not advisable to contact prospective supervisor for AYF according to the officer from embassy.