In many developed countries, like in western Europe, Japan, Australia, and so on, postgraduate universities focus on teaching many detail items of one research topic in order to lead to M.S or Ph.D. research in that particular topic . In contrast, in other developed countries like USA, Canada, S. Korea, and so on, postgraduate universities prefer of teaching many courses of a number of topics in order to lead to M.S or Ph.D. research in one of the topic.
So, Which postgraduate system of a university in developed countries would you recommend for your fresh graduate students, taking into the account of the significant role of the academic mentor in the area of the research?