日语敬语是日语中用于表达敬意的词语，用来表示说话者、说话对象、话中人物之间的社会阶级、亲疏等关系。出席使用日语的许多社交场合必须使用敬语，以表达适当的身分关系和礼貌。日语的敬语系统发达，部份概念与朝鲜语极为相似，也有和汉语类同之处。

日语敬语一般可分为丁宁语、尊敬语和谦逊语三大类。有时也可以再另分为郑重语和美化语两类敬语。说话人会根据谈话内容以及对象，而使用相关的辞汇或是动词变形。

日语敬语与敬称是两种词语。

The Japanese language uses a broad array of honorific suffixes for addressing or referring to people. These honorifics attach to the end of people's names, as in Joseph-san where the honorific -san was attached to the name Joseph. These honorifics are often gender-neutral, but some imply a more feminine context (such as -chan) while others imply a more masculine one (such as -kun).