I think 中文 is written as 中国语 in Japanese. Actually, Chinese say 中文 or 汉语，we never say 中国语。

I never use "中国语", I usually say "中文" or "汉语".

中国语 chūgoku-go / chuugoku-go; Japanese 中文 zhōng wén; Chinese. Different languages using the chinese characters/kanji; but there is nothing wrong with using 中国语 in chinese as the direct translation would mean the same thing.

@ anita998710：我看了所有的答案，結果竟然沒有一名回答者能 *正確地* 書出日語所表達的「中国語」；可卻有不少人卻言之鑿鑿地說「中国语　(或)　中國語」就是日語的寫法，有些更無知到說這是中國大陸以外的華人用以表達「中文」的稱呼。唉，這真可算是蠻悲哀的。

let me tell you the true. 中文= 是指 （漢語） it is indicated as mandarin. 中國語(中國話）= 指漢語、且包括 其所有在中國存在的語言（包括其余的55個種族的語言） while the second one is indicated those all small or dialects 55 races' languages that exist in china. arigatou watashi no friend.