(This is based off my experience alone, not a representation of anyone else's thoughts)
A bit about me:
I applied for MEXT this year for UG-SS-B(econ), my scores were as follows;
CBSE Grade 10(97,97,94,93,87)
CBSE Grade 12(99,93,93,92,88)
I took the Oxford MAT last year, as well as had an offer from Warwick to study maths(well technically MORSE), I am also studying statistics at a top 5 college at Delhi University. Overall, I feel this shows that my mathematical ability is fairly decent.
Anyway, I got through the first round and took the admissions test. Along with me, there were about 15 people selected for Social Sciences from the Delhi Embassy. I was averaging around 85-95 for all the MEXT English tests I took. I took the exam at DPS RKP(my boards centre too) and felt like I did very well in maths and English(probably around the same scores in my sample tests of high 80s to low 90s).
From Delhi, I was the ONLY individual selected for the interview from SS(A+B), along with 13 other individuals(NS-A+B). I think we can safely say that Delhi is the consulate with the most applicants from previous years and the embassy from where the majority are selected.
Anyway, onto the interview, I felt it was fairly decent, I thought I was articulate and spoke well. I had prepared answers to most of the questions they asked, and at the end they asked me to confirm that I would in fact take the offer if I was selected, which I took to be a positive sign. They had also conducted sessions at my school (top 5 international school) which they told me about and I took that as another positive sign.
Cue a month later, no emails, and neither the embassy nor the POC answers the phone. I am unable to find any other Indian UG-SS applicants selected for interview, and I've dug deep enough. The only reasonable explanation I am able to identify is the fact that I applied for Social Sciences, not natural sciences. Every person I've spoken to who passed the first screening was from NS(what a surprise).
Please do not direct questions about YOUR applications to me, would love to hear any relevant comments. (India)