'Rì yǔ' literally means 'sun language' — 'rì' (日) is the character for 'sun' or 'Japan' (as in 'Land of the Rising Sun'), and 'yǔ' (语) means 'language' or 'speech'. Together, they form the standard term for the Japanese language in Chinese. Unlike English, where we say 'Japanese', Chinese uses a compound noun that reflects cultural geography: Japan is associated with the sun, so its language is the 'sun language'.

This word is used formally and informally across education, media, and daily conversation — for example, when discussing language study, translation, or cultural exchange. It’s neutral in register and appears in contexts like university course titles ('日语专业'), news reports ('日语广播'), or personal statements ('我在学日语'). It does not refer to Japanese people or culture broadly — only the language itself — so it’s distinct from terms like '日本' (Japan) or '日本人' (Japanese person).