2. At present, national universities basically require TOEFL scores or TOEFL scores (some are not required, the same as above).
3. Communication belongs to engineering, engineering preparatory students (masters), and graduated in the shortest 2 years. In other words, if you study hard, you can graduate in two years, instead of Grade 6. Does not include the audited courses. (PS: It is difficult for students who have graduated from domestic universities with a master's degree in Japanese engineering to get into a good university without listening. )
It is best to get a visa to Japan without going through a language school, but most people can't. 90% of those who want to contact professors directly are fooled by intermediaries or the Internet. Professors in regular universities definitely don't know China's agents or people from language schools (language schools are not recognized by the Japanese Ministry of Education, but belong to cram schools). Have you heard that Professor Tsinghua knows the lecturers of New Oriental? Do you believe that people in New Oriental can recommend Professor Tsinghua to you? )
If your family is not very good, and you are not a student of Peking University Tsinghua, you'd better not consider the universities recommended upstairs, because they are all famous Japanese schools, as famous as Peking University Tsinghua. Your competitors are not international students who graduated from China University, but also many international students who graduated from Japanese universities. Their Japanese is at least better than yours, and many achievements are excellent. At least contact the professors. They know that tutors from Japanese universities can help you.
The above is for reference only.