Many private universities in Japan offer English postgraduate courses. The most famous ones are Waseda University Department of Asia-Pacific Studies, Ritsumeikan University, Tongshe University, and sophia university. These universities only need to submit English scores and professional course scores, and there is no requirement for Japanese. As they are applying to study in Japan, it is better to know a little Japanese. After all, the English penetration rate in Japan is not as high as that in China, so they should study more for their own lives.