Is it possible to negotiate scholarship for MS?

Hey guys I got into MS in ### Engineering at Tandon School of Engineering as an international student and in my letter it says I'll get 16k scholarship total (8k/year).

My question is it possible to negotiate or increase this scholarship. I am also got MEXT Scholarship at UoTokyo which is fully fund3d (and also rank3d higher than NYU). So my question is can I use that as a leverage to negotiate my scholarship. If yes who should I contact?