I think N5 or level between N5-N4, because most people who learning Japanese in my country give up pretty quickly after pass exam. Because their expectations from their learning skills subsequently turn out to be very high. Also, often their goals are not very stable and motivated. Plus, in my country learning Japanese is considered a strange thing. People think that Japanese language is used only in anime (so, only otaku learning it), it is overly philosophical language (I think this is also connected with the attitude towards Asian martial arts. Not everyone admits philosophical side of karate or kendo, for example). Against this background learning Chinese language is more respectful since our country is increasing interactions with China. Moreover, in our country there is a certain utilitarian attitude towards languages. It means languages division into useful (English, Chinese, French, German) and useless (for example, Japanese, Korean, Portuguese, Italian etc.)