/jp/ - Otaku Culture

I am contemplating studying the Japanese language, because I may want to reside in Japan. Refer to this image. It uses the example of Asian students as somebody with Kanji knowledge. Is there a list of languages to which the study hours for students with Kanji knowledge apply, whether it is specified in Chinese or English or Japanese? I am confused, because extremely few national languages limited to Chinese and Japanese and Korean an d Vietnamese are written in Chinese characters, so to just list all the national languages to which the column 'students with Kanji knowledge' applies seems much easier. 'Asian students' include languages which do not even use Chinese characters at all such as the Arabic language.

The source of the image is this. https://web.archive.org/web/20151117033458/http://www.studytoday.com/JLPT.asp?lang=EN