An excellent idea of studying in Japan! Very few students aspire to study in Japan. But I am sure you will not regret this decision. MS or MBA is Japan is not costly, may be upto 15 lacs for a two year course, far better than the cost of education in other countries like US, UK or Australia. This degree is nearly equivalent as compared to other countries.
I am sure you will appreciate the university, the curriculum, the people, the technology, the culture and enjoy studying in Japan. This is coming from experience of my daughter doing her MS in Waseda University, in Fukuoka in Japan. She is enjoying academics as well as life in Japan.
Autograph your work with excellence!