任何一种语言都会在人们长期的使用中逐渐发生某种变化,这是在每一个时代都不可避免的现象.社会发展、社会环境变化的同时,必定会出现适应这种发展、变化的语言环境.现代日语在哪些方面发生了怎样的变化,本文从语音、词汇、语法等几个方面分别进行阐述,并针对其变化的原因进行细致的分析. Any kind of language will gradually undergo some change in people’s long-term use, which is an inevitable phenomenon in every age.While social development and social environment change, there must be a language environment that adapts to such development and change What kind of changes have taken place in modern Japanese? This paper elaborates on the aspects of phonetics, vocabulary and grammar, and analyzes the causes of the changes in detail.