Hi! I'm Frank from the Philippines! I will try to apply next year for MEXT scholarship. Hahahaha.
And oh, for the undergraduate scholarship, applicants are selected based on their performance In the written exam, interview, and document screening. The first stage is the document screening. If you are able to pass it, then you can proceed to the written exam. Be wary though because not all people can pass the document screening (e.g due to insufficient requirements, or ineligible to apply pa). If you have completed your requirements and you are eligible, then you are guaranteed to take the written exam.
The Second stage is the Written Exam. The subjects you will examine are dependent on the course you will choose. To say it frankly, only little are able to pass the examination. Be sure to be 1000% ready when you will take it hahaha. ( Yeah, may pagka mahirap iyong Math and to be honest hindi ako medyo kagalingan sa Math. But I'm trying my best to study it. Hahaha) If you passed it, then you go to the interview stage.
Interview stage. The interviewers will interrogate you obviously. Hahahaha. Kung nakapasa ka, nominated ka na ng embassy for the scholarship. In the end, iyong MEXT mismo ang gagawa ng final decision. If you are selected, then congratulations! Mag- aaral ka sa Japan!
You can Google naman the application process and guidelines. You can visit the Embassy of Japan in the Philippines. You can find it here...
Embassy of Japan in the Philippines
Hope this helps! 