1, log on to the university website, where there is a column for researchers to search, where you can find the research direction and achievements of your tutor, and some universities will display your tutor's email address.
2. If the e-mail box is not displayed, you can consult the entrance examination course of the university, or you can get it through the academic affairs of the research department or the entrance examination course. There is no difficulty.
3. Ask more about the enthusiasm of the tutor and compare your own conditions. If you go to Japan, individual language schools will help you, though limited.
-Non-experts